ChatGPT offers unlimited free text chat on its GPT-5.6 Luna model, Microsoft Copilot gives you unlimited Think Deeper reasoning and voice for free, and DeepSeek serves its flagship V4 model free with no ads — making these three the strongest free AI chatbots for 2027.
Every chatbot claims to be free. Almost none of them are honest about it. Some free tiers are generous — unlimited chat on a flagship model. Others are glorified demos: five messages a day, a 24-hour trial that demands your credit card, or a “free plan” that locks every useful feature behind a paywall.
This guide cuts through the noise. Below you'll find 15 AI chatbots with genuinely usable free tiers, each with its exact free-tier limits verified as of October 2026 — message caps, model access, sign-up requirements, and what the paid plans cost. Where we couldn't confirm a number from a reliable source, we say so instead of guessing.
How We Test Free AI Chatbots
Every chatbot in this guide was evaluated against the same five criteria:
- True free cost: Is it free forever, or a trial with a clock running? We flag anything that requires a credit card.
- Usable limits: We publish the actual message or prompt caps from official docs or reputable 2026 reviews — never invented numbers.
- Model quality: Which model do free users actually get — the flagship, a mini version, or an older model?
- Sign-up friction: Can you start chatting without an account? Some of the best free options require zero sign-up.
- Everyday usefulness: Web search, file uploads, voice, memory — the features that decide whether a chatbot is a toy or a tool.
Free-tier limits change constantly, so treat every number below as verified at time of writing (October 2026) and check the official site if a limit matters to you.
The 15 Best Free AI Chatbots for 2027
1. ChatGPT (OpenAI) — Best overall free chatbot
ChatGPT remains the default answer for a reason: since August 2026, OpenAI has offered unlimited text chats on the free and Go tiers, running on GPT-5.6 Luna, the smallest member of the GPT-5.6 family. For everyday questions, drafting, summarizing, and brainstorming, the free tier is genuinely enough.
Free-tier details: unlimited everyday text chat on GPT-5.6 Luna; web search and image generation included (with separate rate limits on images); file uploads work, with a 500 MB Library limit for reusing uploaded files; basic voice mode available; access to the GPT Store to use custom GPTs built by others. The free tier shows ads in some countries, and the heaviest reasoning models (Terra, Sol), Sora video, and Deep Research stay behind the paywall.
Pros
- Unlimited text chat for free — no daily message cliff
- Web search, voice, file uploads, and GPT Store access included
- Best ecosystem: mobile apps, desktop app, and widest third-party integrations
Cons
- Free users get the smallest Luna model, not the stronger Terra/Sol variants
- Ads appear on the free tier in some countries
- Image generation and uploads have separate rate limits
Paid plans: ChatGPT Go ($8/month) raises limits; Plus ($20/month) adds higher usage, stronger reasoning models, Sora video, and Deep Research; Pro ($200/month) is for heavy users. Sign-up: free account required. Best for: first-time AI users and everyday general questions.
2. Microsoft Copilot — Best free reasoning and voice
Copilot is Microsoft's quiet gift to the free-tier world: Think Deeper (its deliberate, multi-step reasoning mode) and Copilot Voice are both free with no published usage limits — two features competitors typically reserve for paid plans. Microsoft states Think Deeper usage is “not limited” for free users, with paid subscribers simply getting priority when capacity is tight.
Free-tier details: general AI chat with web-grounded answers; Think Deeper reasoning free and unlimited; Copilot Voice free for extended spoken conversations; file uploads up to 20 files per conversation (50 MB each); Smart mode adapts depth to the task. Basic chat works without signing in, but voice, chat history, image creation, and personalization require a free Microsoft account.
Pros
- Unlimited free reasoning mode and voice — unmatched on any free tier
- Web-grounded answers with citations by default
- Works without an account for basic chat
Cons
- No dedicated deep-research agent like competitors offer
- Voice, history, and image creation require a Microsoft account
- Feels less polished than ChatGPT's app ecosystem
Paid plans: Copilot Pro ($20/month) adds 100 fast image boosts per day, priority access during peak times, and Copilot inside Word, Excel, and PowerPoint. Sign-up: optional for basic use; required for the best features. Best for: free deep reasoning, voice conversations, and homework-style multi-step problems.
3. DeepSeek — Best completely free flagship model
DeepSeek's chat is the closest thing to a free lunch in AI: the web chat and mobile apps run the company's flagship DeepSeek V4-Pro model with no subscription, no ads, and no in-app purchases. The business model is simple — the chat is free and DeepSeek earns from its API — so there is no paywall lurking behind the free tier.
Free-tier details: completely free at chat.deepseek.com and in the mobile apps; access to V4-Pro and the faster V4-Flash with Instant and Expert modes; built-in web search; deep-thinking reasoning modes; file uploads with text extraction; up to 1M token context window. There is a soft daily cap if you use it nonstop — logging in with a free account raises it — but for normal use it is effectively unlimited.
Pros
- Flagship-class model for free, not a watered-down mini
- No ads, no subscriptions, no upsell screens
- Huge 1M context window and strong reasoning modes
Cons
- Soft daily cap under extreme heavy use
- Text and reasoning focus — no native image or video generation
- Occasional latency during peak hours
Paid plans: none for the consumer chat — the API is the paid product. Sign-up: usable without an account; a free account raises usage caps. Best for: coding, reasoning, and long-document analysis at zero cost.
4. Claude (Anthropic) — Best free chatbot for writing and analysis
Claude's free tier is the connoisseur's pick: free users get access to Claude Sonnet and Haiku with a generous 200K-token context window, file uploads, artifacts, and projects. Anthropic doesn't publish a fixed message count — instead, free accounts get a session-based allowance that resets every five hours, roughly translating to 15–40 messages per window depending on conversation length, attachments, and model load.
Free-tier details: Sonnet and Haiku models; session allowance resets every 5 hours; 200K-token context; up to 20 file uploads (500 MB max per file); up to 5 projects; artifacts for interactive outputs. Long conversations, large PDFs, and heavy tool use burn through the allowance faster. Claude is widely considered the strongest free option for careful writing, complex analysis, and code review.
Pros
- Excellent writing quality and nuanced reasoning, even on the free tier
- 200K context handles long documents easily
- No ads, and a clean, distraction-free interface
Cons
- No fixed quota — heavy sessions can hit the wall unpredictably
- No real-time web browsing by default
- Opus, the strongest model, requires a paid plan
Paid plans: Claude Pro ($20/month, or about $17/month billed annually) raises the allowance substantially and adds more Opus access; Max plans ($100/$200/month) for power users. Sign-up: free account required. Best for: writing, editing, and thoughtful analysis.
5. Google Gemini — Best free chatbot for Google users
If you live in Google's ecosystem, Gemini's free tier is hard to ignore: it plugs into Gmail, Docs, and Drive, generates images, and even runs a few Deep Research reports per month — all for free with a Google account you probably already have.
Free-tier details: up to 30 prompts per day for core chat; up to 100 image generations per day; 5 advanced-model prompts per day; 5 Deep Research reports per month; up to 20 audio overviews per day; 32K-token context window. Google publishes these quotas and notes they can change with testing and availability, so check the in-product notices if you rely on a specific number.
Pros
- Deep integration with Gmail, Docs, Drive, and YouTube
- Generous free image generation (100/day)
- Some Deep Research access without paying
Cons
- Core daily prompt cap is tighter than ChatGPT or Copilot
- Advanced-model access is limited to a handful of prompts per day
- Limits have changed multiple times — expect them to shift again
Paid plans: Google AI Pro ($20/month) and AI Ultra ($250/month) multiply every quota and add video generation. Sign-up: Google account required. Best for: Google Workspace users and free AI image generation.
6. Perplexity — Best free AI search chatbot
Perplexity isn't a chatbot in the ChatGPT mold — it's an answer engine that searches the live web and cites its sources for every claim. The free tier gives you near-unlimited basic searches with citations, making it the best free replacement for the “ten blue links” era of research.
Free-tier details: near-unlimited standard searches with real-time citations; around 3–5 Pro (advanced research mode) searches per day; 1 Deep Research query per month; around 3 image generations per day (non-commercial); automatic model selection; limited file uploads (roughly 3 per day). Pro searches let you pick frontier models from OpenAI, Anthropic, Google, and xAI — the free tier assigns a model automatically.
Pros
- Every answer cites live web sources — best free option for verifiable research
- Near-unlimited basic searches for free
- Clean, fast interface with follow-up questions
Cons
- Only a few Pro searches per day on free
- Not built for creative writing or long conversations
- No model choice without a subscription
Paid plans: Pro ($20/month, or $200/year) unlocks hundreds of daily Pro searches, model choice, and more Deep Research. Sign-up: usable without an account; account unlocks history and higher limits. Best for: research, fact-checking, and current-events questions.
7. Poe (Quora) — Best free multi-model playground
Poe puts dozens of AI models — from OpenAI, Anthropic, Google, xAI, Meta, and open-source labs — behind one chat interface. Free users get 300 compute points per day (reset daily, no rollover), and lightweight models cost only a few points per message, which works out to roughly 30–50 conversations a day on efficient models. Premium models cost far more per message, so free users should stick to the budget-friendly bots.
Free-tier details: 300 daily compute points, issued automatically and reset every 24 hours; points don't accumulate; cheap models (a few points per message) allow dozens of daily chats; expensive flagship models drain the budget in a handful of messages. Poe also lets you build and share your own bots.
Pros
- Try many models side by side without multiple subscriptions
- Generous free allowance if you pick efficient models
- Bot creation and a large community bot library
Cons
- Point math is confusing — every message is a budgeting decision
- Flagship models are effectively paywalled for heavy use
- Context memory settings trade recall against cost
Paid plans: subscriptions start at $4.99/month for larger daily/monthly point allowances. Sign-up: free account required. Best for: comparing models and trying new releases cheaply.
8. DuckDuckGo AI Chat (duck.ai) — Best free chatbot with no sign-up
Duck.ai is the privacy-first option: chat with models from OpenAI, Anthropic, Meta, and Mistral anonymously, with no account. DuckDuckGo proxies your requests, strips identifiers like your IP, and has agreements that stop providers from training on your chats. For the full no-sign-up experience, see our guide to free AI chatbots that need no sign-up.
Free-tier details: completely free with no account required; daily usage limits apply; chat history stays in your browser, not on DuckDuckGo's servers; model lineup rotates over time (recent lineups have included Claude Haiku-class, Llama, Mistral, and GPT mini-class models). A paid DuckDuckGo subscription adds more advanced models and higher limits.
Pros
- Zero sign-up — start chatting in seconds
- Real privacy: anonymized requests, no training on your chats
- Switch between multiple providers in one interface
Cons
- Daily limits are modest compared with signed-in competitors
- No chat history across devices (browser-local only)
- Model lineup changes — your favorite model may rotate out
Paid plans: DuckDuckGo's paid subscription raises limits and adds advanced models. Sign-up: none required. Best for: private questions and anyone who refuses to create another account.
9. HuggingChat — Best free open-model chatbot
HuggingChat is Hugging Face's open chat interface, and its superpower is choice: free users can chat with 100+ open-weight models — Llama, Qwen, Mistral, DeepSeek variants, and more — with web search, document upload, and custom assistants. There is no published daily message cap on the free tier, which makes it one of the most generous free chatbots available.
Free-tier details: free with a Hugging Face account; access to 100+ open models with no published daily message limit; web search and document uploads; custom assistants with file-based knowledge; data-sharing toggle for logged-in users. Some of the largest or newest models may require a Hugging Face Pro subscription ($9/month), and per-model availability can shift — check the model picker if a specific model matters to you.
Pros
- Huge model selection, all free
- No published daily message cap
- Open models with fewer content restrictions than corporate chatbots
Cons
- Quality varies widely between models — you have to pick well
- Interface is more technical than ChatGPT or Claude
- No native image or video generation
Paid plans: Hugging Face Pro ($9/month) adds inference credits, priority access, and access to some larger models. Sign-up: free Hugging Face account required. Best for: experimenting with open models and avoiding corporate content filters.
10. Meta AI — Best free chatbot inside social apps
Meta AI is already where billions of people chat: inside WhatsApp, Instagram, Facebook, and Messenger, plus a standalone web and mobile app. Since April 2026 it runs on Muse Spark, Meta's closed model from Meta Superintelligence Labs, with Instant and Thinking modes, voice conversations, image creation, and web/social context.
Free-tier details: free for everyday use across all Meta apps and the standalone app; chat, image generation, voice, web search, and agent-style features like research and slide-building included. Optional Meta One subscriptions (launched September 2026, roughly $2.99–$19.99/month depending on plan and country) add higher usage limits and extra creative capacity. One honest caveat: Meta says it may use your AI chats to personalize ads, with no opt-out — don't share anything sensitive.
Pros
- Zero friction — already inside apps you use daily
- Strong free feature set: voice, images, thinking mode, web search
- Socially grounded answers from public Facebook/Instagram content
Cons
- Privacy trade-off: chats may feed ad personalization with no opt-out
- Not the strongest model for hard reasoning or coding
- Paid tiers are new and still rolling out by region
Paid plans: Meta One plans from about $2.99 to $19.99/month add capacity and creative features. Sign-up: Meta account required. Best for: casual questions without leaving your social apps.
11. Grok (xAI) — Best free chatbot for real-time buzz
Grok's edge is its connection to the live conversation: it's the chatbot most plugged into what's happening right now on X and the web, with a wittier, less corporate tone than its rivals. The free tier is usable but modest — roughly 10 prompts per two-hour window, so check the official site for current limits.
Free-tier details: free access on X and grok.com with a rate-limited free tier (about 10 prompts per 2 hours at last check); real-time information and a distinctive personality; image generation included with limits. Paid SuperGrok plans raise the caps substantially.
Pros
- Best free option for real-time and trending topics
- Distinctive, less filtered personality
- Image generation on the free tier
Cons
- Free message allowance is small
- Weaker for careful writing and long-form work
- Requires an X account
Paid plans: SuperGrok subscriptions raise limits and unlock stronger models — check xAI's site for current pricing. Sign-up: X account required. Best for: news, trends, and unfiltered takes.
12. Character AI — Best free AI roleplay and characters
Character AI pioneered the AI-character boom, and its free tier is still remarkably generous: unlimited messaging with millions of community-created characters, from historical figures to original creations. If you want SFW roleplay, storytelling partners, or practice conversations, start with our roundup of free Character AI alternatives alongside this one.
Free-tier details: unlimited messaging on the free tier; access to the full character library; basic models; mid-chat ads; swipes, go-ons, and memos are capped on free (unlimited on paid); voice calls limited. Paid c.ai+ ($9.99/month, or $94.99/year) removes ads and caps, speeds up responses, and unlocks the latest models; a cheaper lite plan ($4.99/month) adds a daily allowance of premium chats.
Pros
- Unlimited free messaging — rare in the character-chat space
- Millions of characters and strong community
- Strict content filtering keeps it SFW-friendly
Cons
- Mid-chat ads interrupt free conversations
- Memory is weak — characters forget context after long chats
- Free users get slower, older models
One flag: reports surfaced in October 2026 that Character.AI filed for Chapter 11 bankruptcy protection, with the company saying the platform would remain online during a court-supervised sale — but that if no buyer continues operations, the service could wind down. This was reported by third parties and had not been fully confirmed by the company at the time of writing. Check Character.AI's official status before investing time in building characters there. Sign-up: free account required. Best for: SFW roleplay, storytelling, and character chat.
13. Janitor AI — Best free character chat for tinkerers (18+)
Janitor AI takes a different approach from Character AI: the platform itself is free to join and browse, but the intelligence comes from external language models you connect yourself — a paid OpenAI API key, a self-hosted model like KoboldAI, or a free third-party proxy. That flexibility is the appeal: you choose the brain behind your characters.
Free-tier details: free registration and character browsing; free daily credits have historically been offered (around 250 credits/day at times, enough for casual chatting); to chat beyond the free allowance you connect your own API key — OpenAI keys cost per token, while self-hosted KoboldAI or free proxies cost nothing but require setup. Paid subscription tiers exist for higher limits.
Important: Janitor AI requires users to be 18 or older and hosts largely unfiltered content. We cover it here for completeness, but if you want character chat with stricter guardrails, our Janitor AI alternatives guide lists SFW-friendly options like Character AI, Poe, and HuggingChat.
Pros
- Bring-your-own-model flexibility no hosted platform matches
- Large library of community characters
- Free entry point with daily credits
Cons
- 18+ only — not suitable for younger users
- Setup is technical: API keys, proxies, or self-hosting
- Response quality depends entirely on the model you connect
Paid plans: subscription tiers for higher limits exist — check the official site for current pricing. Sign-up: free account (18+) required. Best for: adults who want full control over the model behind their characters.
14. Chai — Best free character chat app (mobile-first)
Chai is a mobile-first character-chat app with a huge community bot library and leaderboards. The free tier gives you roughly 70 messages per 2.5-hour window with ads — enough to try it, but heavy users will hit the wall fast. A 24-hour free trial of premium lets you test the paid experience before committing.
Free-tier details: about 70 messages per 2.5-hour rolling window; ads in the free experience; standard AI models; slower responses during peak hours. Premium (around $13.99/month or $134.99/year) removes ads and the message cap; Ultra (around $29.99/month) adds longer replies and better recall; a weekly Pro plan (around $9.99/week) is also sold. Prices vary by platform and region — confirm in your app store before buying.
Pros
- Polished mobile experience with a big bot community
- 24-hour free trial of premium to test before paying
- Leaderboards make discovering good bots easy
Cons
- 70-message window is tight for real conversations
- Ads interrupt the free experience
- Weekly billing option is expensive if left running
Sign-up: app download with Google, Apple, or Facebook sign-in. Best for: mobile character chat on the go.
15. Replika — Best free AI companion
Replika isn't a general-purpose assistant — it's an AI companion designed for ongoing conversation, emotional support, and relationship-building with a customizable 3D avatar. The free tier covers basic text chat with limited daily messaging in friend mode, which is enough to see whether the concept clicks for you.
Free-tier details: basic text conversations with limited daily messaging; friend relationship mode; basic avatar customization; core emotional-support features. The paid Pro tier (around $19.99/month or about $69.99/year, shown in-app and varying by platform) unlocks unlimited messaging, voice calls, partner/mentor relationship modes, full avatar customization, and AR features. Replika's pricing is shown in the app rather than on its website, so confirm current prices on your device.
Pros
- Unique focus on companionship and emotional support
- Memory system that learns about you over time
- Free tier is enough to evaluate the concept
Cons
- Free tier is heavily limited — the real product is paid
- Not useful as a general assistant or for work tasks
- Memory can be unreliable over long periods
Sign-up: free account required. Best for: anyone curious about AI companionship rather than productivity.
Free AI Chatbots Compared
| Tool | Free tier | Sign-up | Best for |
|---|---|---|---|
| ChatGPT | Unlimited text chat (GPT-5.6 Luna); limited images/uploads | Free account | Everyday general use |
| Microsoft Copilot | Unlimited Think Deeper + voice; 20 files per chat | Optional (needed for best features) | Free reasoning & voice |
| DeepSeek | Flagship V4 model free; soft daily cap | Optional | Coding & reasoning at zero cost |
| Claude | Sonnet + Haiku; 5-hour session allowance (~15–40 msgs) | Free account | Writing & analysis |
| Google Gemini | 30 prompts/day; 100 images/day; 5 research/month | Google account | Google ecosystem users |
| Perplexity | Near-unlimited basic searches; ~3–5 Pro searches/day | Optional | Research with citations |
| Poe | 300 compute points/day (~30–50 chats on light models) | Free account | Trying many models |
| Duck.ai | Free anonymous chat within daily limits | None | Private, no-sign-up chat |
| HuggingChat | 100+ open models; no published daily cap | Free HF account | Open-model experimenting |
| Meta AI | Free in all Meta apps; chat, voice, images | Meta account | Social-app convenience |
| Grok | ~10 prompts per 2 hours | X account | Real-time trends |
| Character AI | Unlimited messaging; ads; capped swipes | Free account | SFW character roleplay |
| Janitor AI | Free signup; daily credits; bring-your-own-model | Free account (18+) | Custom model control |
| Chai | ~70 messages per 2.5 hours; ads | App sign-in | Mobile character chat |
| Replika | Basic text chat; limited daily messages | Free account | AI companionship |
A note on "free" wording: throughout this guide, "free forever" means no credit card and no expiry; "free tier" means a permanent $0 plan with published usage limits; and "free trial" means time-boxed access that ends or converts to paid. If a tool above ever asks for your card on the free plan, treat that as a trial, not a free tier — and check the cancellation terms before entering payment details.
How to Choose the Right Free AI Chatbot
Start with your primary use case, not the brand name:
- Everyday questions and homework: ChatGPT (unlimited chat) or Microsoft Copilot (unlimited reasoning + voice). Copilot wins if you want to talk instead of type.
- Writing, editing, and analysis: Claude's free tier has the best prose quality, with a 200K context window for long documents.
- Coding and technical work: DeepSeek's free V4 access is extraordinary value; Claude is the backup for code review.
- Research and fact-checking: Perplexity, because every answer cites live sources. Use it alongside, not instead of, a general chatbot.
- Privacy-sensitive questions: Duck.ai needs no account and anonymizes your requests. Avoid Meta AI for anything confidential.
- Character chat and roleplay (SFW): Character AI for unlimited free messaging, or browse our free Character AI alternatives if you want options without sign-up.
- Trying many models: Poe or HuggingChat let you compare dozens of models on one free account.
- Inside your social apps: Meta AI, already in WhatsApp, Instagram, and Messenger.
A practical tip: most people end up using two free chatbots — one general assistant (ChatGPT or Copilot) and one specialist (Perplexity for research, Claude for writing, or DeepSeek for code). Since they're all free, there's no reason to pick just one.
Free vs Paid: When Should You Upgrade?
Free tiers in 2027 are good enough that most casual users never need to pay. Consider upgrading only when you hit a specific wall:
- You hit message caps daily. If Claude's 5-hour allowance or Gemini's 30-prompt cap regularly stops you mid-task, $20/month (ChatGPT Plus, Claude Pro, or Google AI Pro) removes the friction.
- You need the strongest models. Free tiers give you Luna, Sonnet, or Haiku-class models; the top reasoning models (GPT Terra/Sol, Claude Opus) are paid-only.
- You need deep research or agents. Multi-step research reports and autonomous agents are the most consistently paywalled features across all platforms.
- You want privacy or no ads. Paid tiers generally remove ads (ChatGPT, Character AI) and offer better data controls.
Don't pay to remove a limit you never hit. Use the free tier hard for two weeks first — if you never see a cap warning, you don't need the subscription. And never pay for a “free trial” that asks for your credit card upfront without checking the cancellation terms; several character-chat apps use weekly billing that adds up fast.
Tips for Getting More From Free Tiers
- Keep conversations focused. On quota-based tiers like Claude, one long thread with a huge history burns allowance faster than several short, focused chats. Start a new chat for each new topic.
- Use the right model for the job. On Poe, cheap models cost a few points per message while flagships cost far more — save the expensive models for questions that need them.
- Batch your uploads. File uploads count against usage on most platforms; combine documents into one file when the platform allows it.
- Check limits before big projects. Free quotas change — Gemini's and Poe's have both shifted significantly within the last year. Verify the current numbers on the official site before planning around them.
- Watch for weekly billing traps. Some apps sell “Pro” weekly at $9.99/week, which is over $500/year if you forget to cancel. Prefer monthly or annual billing.
Our Verdict
For 2027, the three free chatbots worth installing first are ChatGPT (unlimited everyday chat), Microsoft Copilot (unlimited reasoning and voice), and DeepSeek (a flagship model with no ads and no subscription). Add Claude for writing, Perplexity for research, and Duck.ai when you want privacy without an account — and you'll have a complete free AI toolkit that covers nearly everything the $20/month plans do for casual use. Limits change often, so bookmark the official pricing pages of your favorites and re-check before any big project.