In this article, we'll discuss the 7 best Merlin AI alternatives, along with their prices, main features, and why you might consider using each instead of — or alongside — your Merlin. Let's get started.
In this article, we'll discuss the 7 best Merlin AI alternatives, along with their prices, main features, and why you might consider using each instead of — or alongside — your Merlin. Let's get started.
Merlin AI is an AI model aggregator most known for its browser sidebar feature that lets you chat with websites, as well as for bringing multiple AI models under a single roof. However, some users consider it to be expensive and look for other alternatives that offer the same or similar capabilities for cheaper.
Overchat AI is the best all-in-one Merlin AI alternative as it offers over 50 text, image, and video models along with over 150+ tools, has web and mobile apps, and adds new models within a day of official release, all for $14.99/month or $49.99 a year.
Merlin AI has a fair use feature that annoys many users — if you get their unlimited Pro plan, your message limit is capped by an invisible fair-use credit system that allegedly limits you to around $100 of usage a month, which is not that hard to burn through if you chat with heavier models.
If you specifically want a browser sidebar, consider Monica and Sider, as both apps feature that same browser workflow, while also costing less.
Perplexity is the best Merlin alternative for research — it's an app built from the ground up as a research assistant and a replacement for an old-fashioned browser.
If you're looking for a Merlin AI alternative, you can also consider one of the best all-in-one AI platforms.
Merlin AI is one of the most popular third-party AI platforms in the world. It launched in 2021, founded by Pratyush Rai and his co-founders, and backed by Y Combinator. The app has over 5 million users, with a 4.8-star average across more than 9,400 Chrome Web Store reviews. Merlin is best known for their Chrome and Edge extensions that bring together models from GPT, Claude, Gemini, DeepSeek, Llama, and Mistral families.
Merlin AI can answer questions about websites you currently have open, summarize YouTube videos, PDFs, and long articles, draft replies inside Gmail and LinkedIn, and translate content into more than 25 languages.
In terms of cost, here's a table breaking that down:
Merlin AI pricing:
| Plan | Monthly | Annual | Usage |
|---|---|---|---|
| Free | $0 | $0 | ~100 queries/day |
| Pro | $19/month | $228/year | Fair-use cap (~$100/month) |
| Teams | $15/seat | — | Fair-use cap, 2-seat minimum |
Notably, Merlin AI's free plan gives you around 100 queries a day with certain models, which is very generous. If you want to use stronger models, you'll need the Pro plan.
One of the bigger Merlin AI limitations is the fact that their Pro plan reportedly has a hidden cap despite being marketed as unlimited, so when you near $100 of model usage a month, you will stop being able to chat, and the ceiling shrinks proportionally if you bought the plan on a discount. Unfortunately, many users are annoyed by the fact that they can't plan usage ahead of time.
Despite that, Merlin AI has its pros:
Merlin AI pros:
✅ Allows you to easily chat with websites
✅ Very convenient for summarizing YouTube, PDFs, and articles
✅ Has a great free tier at ~100 queries a day
Merlin AI cons:
❌ Unlimited Pro plan has a hidden ~$100/month usage cap
❌ Merlin AI is a bit expensive at $19/month, especially compared to many alternatives
Now that we have an idea about what Merlin AI is, let's talk about the best Merlin AI alternatives you might consider in 2026:
| Tool | Best for | Models | Free tier | Paid from |
|---|---|---|---|---|
| Overchat AI | All-in-one chat, image, and video | 50+ | Yes | $14.99/month |
| ChatGPT | A single top-tier model | 1 provider | Yes | $20/month |
| Monica | Closest sidebar clone | 20+ | Yes | $8.30/month |
| Sider | Cheapest sidebar entry | 30+ | Yes | $8.30/month |
| HARPA AI | Web automation and agents | 10+ | Yes | $12/month |
| Perplexity | Research with citations | 6+ | Yes | $20/month |
| Poe | Hopping between many bots | 20+ | Yes | $19.99/month |
Let's break each of these options down in more detail.
Overchat AI is an all-in-one AI platform that provides access to more than 50 models and 150+ specialized AI tools from one web and mobile app.
New models are added within a day of release, and some clever features such as shared context memory, automatic answer routing, and built-in image and video generation allow you to chat with the most hyped AI models.
Supported Chat models include GPT-5.6, Claude Opus 4.8, Claude Fable, Gemini 3.5, Grok 4.5, and DeepSeek V2 for text, Nano Banana 2, Seedream 5 Pro, and GPT Image 2 for images or Seedance 2 and Kling 3 for video. All of this is included into a single subscription that gives you about 8000 tokens per week to spend between models.
In addition to models and AI chat, Overchat AI is most well known for specialized apps: summarize PDFs with ChatPDF, combine images with the Image Combiner, or use one of the 100+ mini tools including a homework solver and an AI detector.
Overchat AI is available as a web app and native iOS and Android apps.
Price: $14.99/month or $49.99/year. A single-use $2.99 tier is available across the most popular tools if you just want one job done without a subscription. The free plan gives you 100 credits a day to try the text and image models.
Overchat AI pros:
✅ 50+ text, image, and video models in one subscription
✅ 150+ tools, with outputs that flow between them via My Media
✅ Cheaper than Merlin Pro at $14.99/month, with a $2.99 single-use option
Overchat AI cons:
❌ No browser sidebar yet
❌ So many models and tools can feel like a lot at first
ChatGPT is the most famous AI app in the world. Made by OpenAI, they not only provide a chat interface but also develop their own models in the GPT family.
When you use Merlin AI, you often chat with models created by OpenAI, so why not go straight to the source? ChatGPT is also the most-used AI app in the world at around 900 million weekly users. Contrary to what some people believe, despite chat literally being in the name, the app does more than that, as it includes image generation, GPT-Live full-duplex voice, Deep Research for long cited reports, the Canvas writing-and-coding workspace, web search, and custom GPTs.
Of course, ChatGPT shares the same limitation that all first-party model providers have, which is the fact that it locks you to one model family. We've seen time and time again that OpenAI and Anthropic, creators of Claude, sometimes introduce questionable fine tuning and certain generation models start underperforming — this is when you might want to switch to another family, but if you're a ChatGPT user, you can't.
Price: Free tier with limited GPT-5.6 access; Plus is $20/month; Pro is $200/month for the highest limits.
ChatGPT pros:
✅ First-party GPT-5.6 models with the newest features first
✅ Deep Research, Canvas, GPT-Live voice, and web search built in
✅ Free tier is enough for casual use
ChatGPT cons:
❌ Single provider
❌ Plus at $20/month costs more than several multi-model tools
❌ No on-page sidebar for summarizing what you're reading
Monica is the closest thing to a like-for-like Merlin AI alternative. It's most known for its browser sidebar extension that opens to the side of a web page you have open and allows you to ask questions about it or summarize information with AI.
Since January 2026 Monica runs on an Advanced Credits system, where frontier models spend more credits per query than lighter ones. The free plan covers 40 queries a day on basic models. If you want to see how Monica stacks up against the rest of this category, we compared it in depth in our Monica AI alternatives guide.
Price: Free (40 queries/day); Pro is around $8.30/month billed annually; Pro+ is around $16.60/month billed annually.
Monica pros:
✅ Sidebar workflow nearly identical to Merlin's
✅ 20+ models with a flexible credit system
✅ Lower entry price than Merlin Pro
Monica cons:
❌ Credits on frontier models drain faster than you'd expect
❌ Still a browser extension, so the same on-page-only limits apply
❌ Heavy image and video generation aren't its strength
Sider is a browser sidebar assistant that consolidates 30+ models, and it's the cheapest Merlin AI alternative. This is a very popular app — around 4 million active users and a #3 Product Hunt ranking.
Sider has many powerful features, including:
Price: Free (30 credits/day); Basic is $8.30/month; Pro is $12.40/month; Unlimited tier available for all-model access.
Sider pros:
✅ 30+ models plus research and browser-automation agents
✅ Lowest paid entry point among the strong alternatives
✅ 4 million users, so it's stable and actively maintained
Sider cons:
❌ Credit limits on the cheaper tiers fill up quickly
❌ The interface is busier than Merlin's cleaner sidebar
❌ No native creative suite for serious image or video work
HARPA AI is another browser extension-first tool, but it's most known for its web automation. For example, HARPA AI can monitor pages for changes, scrape and extract data, run scheduled commands, and chain actions into workflows — basically, it's an AI agent for the web.
That makes HARPA AI the best Merlin alternative for people who want a fully fledged AI assistant that performs actions on their behalf semi-autonomously, such as opening the inbox and replying to emails.
Also, HARPA AI offers a lifetime plan — the X tier is a one-time $240 payment that unlocks HARPA AI forever.
Price: S1 is $12/month billed annually; S2 is $19/month billed annually; X (lifetime) is a one-time $240.
HARPA AI pros:
✅ Web automation, scraping, and scheduled commands built in
✅ Connects to GPT, Claude, Gemini, and Perplexity
✅ One-time lifetime plan avoids a recurring bill
HARPA AI cons:
❌ Steeper learning curve than a plain chat sidebar
❌ Automation power is overkill for summarizing and writing
❌ No dedicated image or video generation suite
If your main use for Merlin AI is research, Perplexity is the best alternative for you, as it's built entirely around finding, summarizing, and consolidating information with transparent sources.
Perplexity is powered by its own first-party models, but you can also toggle between GPT-5.6, Claude Opus 4.8, and Gemini 3.5 if you're a Pro user.
However, Perplexity isn't a direct Merlin AI alternative for people who use AI in many different ways. For example, if you often generate videos with AI as well, look for an alternative that's more media-focused or more of an all rounder, such as Overchat AI.
Price: Free tier with limited searches; Pro is $20/month or $200/year; Max is $200/month for the heaviest research use.
Perplexity pros:
✅ Inline citations on every answer for easy fact-checking
✅ Multi-model access plus access to paywalled premium sources
✅ Best-in-class for research and source-heavy writing
Perplexity cons:
❌ Not built for on-page drafting or general assistant tasks
❌ Pro at $20/month is at the higher end of this list
❌ Weaker for creative writing and content generation
Poe is one of the most famous multi-model aggregators developed by the same team that created Quora. It's primarily a chatbot-based tool that unlocks access to GPT, Claude, Gemini, and other AI tools from a single interface.
Poe is most well known for its community-built and open-source bots — they give you a toolkit to make and release your own bot and the community can then engage with it. This is, essentially, Poe's version of Custom GPTs.
For a fuller look at how Poe compares to other multi-model platforms, see our Poe alternatives guide.
Price: Free tier with a daily points allowance; subscription is $19.99/month for a large compute budget across all bots.
Poe pros:
✅ One of the widest model rosters in a single app
✅ Access to many community and open-source bots
✅ Standalone app and web access, not tied to the browser
Poe cons:
❌ No on-page sidebar for summarizing or drafting in context
❌ The points system makes heavy use hard to predict
❌ No native image editing or video generation tools
Here are the most common questions about Merlin AI and its alternatives.
Is there a free Merlin AI alternative?
Yes. Overchat AI gives you 100 credits a day free, Monica gives you 40 queries a day, and Sider gives you 30 credits a day, so you can run GPT, Claude, and Gemini without paying. ChatGPT also has a free tier, though it's limited to one company's models.
Is Merlin AI worth it?
Merlin AI is worth it if you actively use several AI models and want them in one browser sidebar, since bundling GPT, Claude, and Gemini for $19/month is cheaper than separate subscriptions. It's not worth it if you mostly use one model or if you're a heavy user who'll hit the Pro plan's ~$100/month fair-use cap, in which case a full platform like Overchat AI or a single ChatGPT Plus plan is the better buy.
Why isn't Merlin AI's "unlimited" plan actually unlimited?
Merlin AI's Pro plan is marketed as unlimited but runs on an invisible fair-use credit system that caps usage near $100 of model cost a month. That ceiling shrinks if you bought the plan on a discount, and once you hit it your account is paused until the next billing cycle unless you buy top-up credits.
What is the best Merlin AI alternative?
The best Merlin AI alternative for most people is Overchat AI, because it runs 50+ models across chat, image, and video plus 150+ tools in one app for $14.99/month, which is cheaper than Merlin Pro and covers far more than a browser sidebar can.
Is Merlin AI safe to use?
Merlin AI requires broad browser permissions to read the pages you're on, and your prompts pass through Merlin's servers before reaching the model APIs. Merlin's privacy policy says it doesn't store conversation data long term, but for sensitive work a web-app platform that doesn't sit inside your browser gives you a tighter data boundary.
In this article, we've gone over some of the best Merlin AI alternatives for people who use AI to summarise web content, research, and create text, images, and videos.
Key takeaways:
