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Merlin AI vs Neurohelper AI

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. Neurohelper AI publishes a starting price ($15); Merlin AI does not. Both have a free tier. Only Neurohelper AI ships a public API.

Merlin AIBrowser sidebar running many chat models on any pageNeurohelper AIOne credit-based subscription for chat, image, video, audio, and voiceover generation across several underlying AI models.

Side by side

FactMerlin AINeurohelper AI
CategoryBrowser Extensions & CopilotsMulti-model Chat Aggregators
Pricing modelFreemiumFreemium
Starts at—$15 month
Public APINoYes
PlatformsWeb, Chrome Ext, iOS, AndroidWeb, API
CompanyFoyer Tech Inc.Neurohelper AI
Launched2022—
Last verifiedSep 6, 2026Sep 1, 2026

What our research says

Merlin AI

Buy it if you genuinely rotate between GPT, Claude and Gemini and resent paying three subscriptions — the aggregation is the whole value. If you live inside one model, its native app is faster, cheaper and gets features first.

Pros

  • One subscription reaches a dozen-plus frontier and open models
  • Extension surfaces the assistant directly on Gmail, YouTube, Google and LinkedIn
  • Mobile apps sync history, so the browser session continues off desktop
  • Real free tier for evaluating before paying

Cons

  • 'Unlimited' paid plans are governed by an opaque fair-use credit budget users hit without warning
  • Extension is desktop-Chromium only; mobile browsers get a reduced web app
  • Feature parity with each underlying model's own app is never complete
  • No developer API

Neurohelper AI

Neurohelper AI's pitch is not having to separately subscribe to a chat model, an image generator, and a video generator — one credit balance covers all of them across several providers. That convenience comes with annual billing on every paid tier and pricing that scales quickly once a team needs API access or more than a handful of seats.

Pros

  • single credit balance spans chat, image, video, audio, and voiceover generation across multiple providers
  • 10 free credits let a new user test the workspace before paying
  • unused credits roll over rather than resetting every month, up to a cap

Cons

  • all paid tiers are billed annually, which is a bigger upfront commitment than a monthly plan
  • API access is gated to the Business tier and above, not available on cheaper plans
  • company location is not disclosed

Which one fits

Choose Merlin AI if you need

  • People who compare answers across frontier models before trusting one
  • Heavy in-browser workflows: summarising videos, articles and inbox threads in place
  • Users who want one bill instead of separate OpenAI, Anthropic and Google subscriptions

Choose Neurohelper AI if you need

  • someone who wants chat, image, video, and audio generation under one subscription instead of several
  • trying several underlying AI models without separate accounts for each

More comparisons

All Merlin AI alternatives →All Neurohelper AI alternatives →Browse all Browser Extensions & Copilots →