Monica logo
Personal Assistants · Web Research Browsing

Monica

Monica is an all-in-one AI assistant that works beside any web page, routing your requests to GPT, Claude, Gemini, Sora and other leading models for chat, search, writing, summaries, translation, images, video and code.

Active GDPR compliant Free plan Freemium API available 18+ Verified by Guidaio
Overview

What is Monica?

Monica is a general-purpose AI assistant published by Butterfly Effect Pte. Ltd. and online since February 2023. Rather than building engines of its own, it acts as a router: a request is dispatched to third-party models including GPT-5.5, Claude 4.7 Opus, Gemini 3.1 Pro, Grok 3, Mistral, Sora 2, Veo 2, DALL-E 3, Stable Diffusion, Flux and Nano Banana. The publisher states plainly that it does not train its own foundation models for this service.

The product's centre of gravity is the browser. Installed as an extension for Chrome and Edge, Monica opens a sidebar on any page, attaches a contextual toolbar to selected text and places its answer alongside search-engine results. The same account also works through desktop applications for macOS and Windows, mobile applications for iOS, iPadOS and Android, a web app, and the messaging services WhatsApp, Messenger, Line and Telegram.

Eight blocks are advertised on the home page: chat, summary, writer, search, translator, art, a no-code bot platform and PowerUP, which combines the content of a page with a chosen skill. Behind them sits a large toolbox of twenty-six models, twenty-seven image tools, ten PDF tools, eight writing tools and six summarisation tools. PDFs can be queried in batch, converted to PNG, JPG, PPT or Word, run through OCR, or scanned as CVs and invoices. Writing tools cover rewriting, grammar checking, AI-content detection and a step-by-step maths solver. Summarisation covers web pages, YouTube videos with timestamps, podcasts, mind maps and audio transcription. Image tools range from generation and upscaling to background, object and watermark removal, logos, avatars and headshots.

Developers get two further surfaces: Monica Code, an assistant for VS Code and JetBrains IDEs, and Monica Open API, a paid multi-model API billed separately from the consumer subscription.

The home page claims more than ten million users, over 160,000 reviews and ratings of 4.9 on the Chrome Web Store and 4.6 on Product Hunt. The interface ships in twenty-five locales and translation is advertised across more than 120 languages. An account is required and access is restricted to adults.

What it does

  • Open an AI sidebar on any web page and question its content in one click
  • Compare answers from several models side by side before choosing one
  • Summarise a web page, an email or a YouTube video with timestamps
  • Translate a full page into an immersive bilingual reading view
  • Chat with one or several PDFs and extract summaries, tables and sources
  • Generate images, videos and interactive artefacts from a text prompt
  • Write, rewrite and insert text directly into any input field on the web
Audience

When to use Monica / When not to

A quick filter to help you decide if Monica is the right fit.

When to use Monica

  • Knowledge workers who live in their browser and want an assistant on top of the pages, emails and videos they already read
  • People who would otherwise pay for two or three separate AI subscriptions and want a single one that reaches several vendors
  • Students, researchers and academics writing papers, reviewing literature, generating citations or working through maths problems
  • Marketers, copywriters and community managers producing volume content, ad copy and social posts in several languages
  • Developers who want a code assistant inside VS Code or a JetBrains IDE, plus a multi-model API for their own products

When not to use Monica

  • Anyone under 18: sign-ups are blocked and accounts are deleted once under-age use is known
  • Organisations that need a contractual guarantee their content will not be exploited, since the terms grant a perpetual licence to use it in aggregated form
  • Teams bound to European data residency, as the servers and central databases are declared to be in the United States
  • Buyers who need to compare prices before creating an account, because the pricing grid does not render without JavaScript
  • Companies with a formal vendor-review process, given the absence of a published subprocessor list, security certification or named team
Get started

How to use Monica

A typical end-to-end flow, from setup to results.

  1. Install the extension from the Chrome Web Store or the Edge Add-ons store, or download the macOS, Windows, iOS or Android application
  2. Create an account and sign in; the free plan starts immediately with a daily quota
  3. Press Cmd+M on macOS or Ctrl+M on Windows to open the assistant on the page you are reading
  4. Select any text on a page to reveal the Quick Actions toolbar and explain, translate, rewrite or expand it
  5. Open the sidebar to chat, search the live web or summarise the current page or video
  6. Pick a model, or ask several at once and compare the answers before keeping one
  7. Upload one or several PDFs to question them, summarise them or convert them
  8. Browse the eighty-plus prompt templates to draft marketing copy, then insert the result straight into the page
  9. Install Monica Code in VS Code or a JetBrains IDE if you want completions and unit tests in your editor
  10. For programmatic use, open a separate account on the developer platform, top up the balance and follow the quickstart
Quick read

Pros & Cons

Pros

  • One subscription reaches models from several competing vendors instead of one
  • Side-by-side model comparison is a genuine differentiator, not a marketing line
  • Available almost everywhere: browser, desktop, mobile, web, IDEs and four messaging apps
  • The advertised Unlimited tier at 16.6 USD per month undercuts the 20 USD subscriptions it is compared against
  • A permanent free plan with a daily quota lets you test the whole toolbox before paying
  • Unusually wide functional coverage, from chat and research to PDFs, images, video, audio and code
  • Interface in twenty-five locales, with translation advertised across more than 120 languages

Cons

  • The pricing page renders through JavaScript and publishes no amount: only the Unlimited tier has a public price, and only on comparison pages
  • The Pro and Team tiers exist in the page's own code but no price for them is published anywhere
  • No about page, no named team, no official social profile: the company behind the product is barely visible
  • A single postal address on the whole site, a private mailbox in San Francisco, for a Singapore-incorporated company
  • No published subprocessor list, no security certification, and a Data Processing Agreement cited without a link
  • Marketing claims full privacy while the terms grant a perpetual licence over content in aggregated form
  • Payments are declared final and non-refundable, with partial refunds left entirely to the publisher's discretion
Pricing

Pricing & Plans

Monica operates on a freemium basis. A permanent free plan is available and does not expire; it applies a daily quota of queries and limited trial credits for image and video generation, with access to the advanced models reserved for paying tiers. The lowest paid price that the publisher makes public is 16.60 USD per month for the Unlimited tier, quoted on the comparison pages against competing subscriptions at 20.00 USD per month. That figure is not an entry price: the pricing page's own code refers to Pro and Premium tiers positioned below Unlimited, and no amount for them appears in the served page, which is rendered client-side. Advanced credits may be purchased as an add-on, an annual commitment is discounted, and the developer API is billed separately on a prepaid balance. Payments are declared final and non-refundable.

Free
  • permanent plan with a daily query quota
  • access to the standard models and limited image and video trial credits
  • reset every midnight
Premium
  • paid intermediate tier named in the pricing page
  • with no amount published on the site
Unlimited
  • 16.60 USD per month according to the comparison pages
  • with unlimited access to the advanced models
Team
  • billed per seat
  • with advanced credits allocated per seat and free seats beyond a threshold
  • no public amount
Advanced credits add-on
  • extra credit packs purchasable on demand on top of any paid tier
Monica Open API
  • outside the subscription entirely
  • prepaid balance consumed per successful call
Special offers — Annual billing is discounted against the monthly rate, though the saving is not published as a fixed amount · A user referral scheme awards premium query credits for invitations, with five credits granted to the invited user on sign-up · Limited free credits for image and video generation are included on the free plan · Promotional coupons appear periodically on the pricing page; these are dated campaigns rather than standing offers · No student, non-profit or jobseeker discount is published on the site
Prices and plans listed above may evolve. Always check the official pricing page before subscribing.
Trust & Privacy

Data, GDPR & hosting

A consolidated view of how Monica handles your data.

GDPR overview

Implementation is partial but real. The privacy policy, last updated on 14 June 2024 and effective since 28 February 2023, carries a dedicated GDPR Privacy section listing the six legal bases and the rights of access, rectification, objection, erasure, portability and withdrawal of consent, exercised through contact@monica.im or account settings. A separate CCPA section covers California residents. The user safety policy claims compliance with the EU Digital Services Act and the EU AI Act. Three gaps matter: no Article 27 EU representative is designated, no data protection officer is named, and the Data Processing Agreement referenced in the terms is nowhere published. Data is declared to be transferred to and stored in the United States, under United States law.

Who owns the data?

The terms state that the company claims no ownership of inputs or outputs: as between you and the publisher, you own your content. Two reservations follow. Section 5.3 grants the company a non-exclusive, worldwide, royalty-free, transferable and sub-licensable licence to use that content while you use the service, plus a perpetual and irrevocable licence to use it in aggregated form to improve the services and create usage data, which the company owns outright. Section 5.4 warns that inputs are passed to third-party AI providers who are not required to keep them confidential and may retain rights to use or disclose them. Customer data is also named as a transferable asset in a sale or bankruptcy.

Reuse rights

Outputs are yours to reuse without asking permission: the publisher claims no ownership and imposes no attribution. Two limits apply. First, the terms warn that an output may not be unique between users and that the company does not warrant it is protectable by any intellectual property right, so exclusivity cannot be assumed for commercial work. Second, reuse must stay within the Usage Policy, which forbids unlawful content, and within the terms of the underlying third-party AI services. On its own side, the publisher uses the data to run and improve the service, to analyse usage and to deliver targeted advertising with third-party vendors, while stating it neither rents nor sells personally identifiable information for advertising monetisation.

Data retention & training

Retention summary
The privacy policy sets no fixed duration for the consumer product: personal data is kept only as long as needed for the purposes of the policy, plus whatever legal obligations, disputes and enforcement of agreements require. The single figure published anywhere on the site concerns the developer API, where data is stored for thirty days for security auditing and then deleted. Users can delete their data from account settings or by writing to contact@monica.im, and Californian residents have a deletion right subject to the usual exceptions. Accounts belonging to under-18 users are deleted once identified. Two limits are worth noting: content posted to a public profile becomes publicly available and can be collected by others, and the perpetual aggregated licence in the terms outlives the deletion of an account.
Trains on customer data
Unclear
DPA available
Yes
GDPR contact

Hosting summary

The privacy policy places the servers and central databases in the United States, and states that information from users outside the country may be transferred, stored and processed there. It adds an explicit warning that the publisher is governed by United States privacy and data protection law, described as very different from the law of the user's own country. No European hosting region, data residency option or standard contractual clauses are offered. DNS resolution points to an Amazon CloudFront node, whose Zurich point of presence is a distribution edge rather than a storage location. Two processors are named in the policy: Amazon SES for email and FastSpring for payments, the latter described as PCI-DSS compliant; no full subprocessor list is published. Declared safeguards are generic — firewalls, encryption, intrusion detection and access restricted to authorised staff. No security certification such as SOC 2 or ISO 27001 is claimed anywhere on the site.

Hosting countries
🇺🇸 United States
Watch-outs

Things to keep in mind

Risks and trade-offs to weigh before adopting Monica.

  • The terms grant a perpetual, irrevocable licence to use your content in aggregated form, which survives deleting your account, while the marketing pages advertise conversations as fully private
  • Inputs are forwarded to third-party AI providers who are not bound to confidentiality and may retain rights to use or disclose them
  • All data is hosted in the United States, with an explicit warning that United States law applies instead of your own
  • Targeted advertising is planned in the privacy policy, with third-party vendors, and customer data is listed as a transferable asset in a sale or bankruptcy
  • No price is readable without JavaScript, so the cost of entry cannot be checked before creating an account, and payments are non-refundable
  • Routing everything through one assistant makes it easy to stop verifying sources: outputs come from third-party models the publisher does not control and does not warrant to be accurate
  • Convenience on this scale invites dependence; delegating summarising, writing and reasoning by default erodes the very skills it is meant to accelerate
Setup

Setup & Integrations

Technical difficulty

Very low for everyday use. The extension installs in one click from the Chrome Web Store or Edge Add-ons, the desktop and mobile applications need no configuration, and the assistant is reachable straight away with Cmd+M or Ctrl+M once an account exists. There is no API key to manage and nothing to connect. Only two paths ask more: Monica Code requires installing an extension inside VS Code or a JetBrains IDE, and the Open API requires a separate account, a funded balance and integration work by a developer.

Deployment

Web appBrowser extensionChrome extensionDesktop appMobile appIOS appAndroid appAPIPlugin

Apps stores

Integrations

WhatsApp Messenger Line Telegram Visual Studio Code JetBrains YouTube GitHub Stack Overflow

Supported languages

EnglishIndonesianCzechGermanSpanishFrenchItalianDutchPortuguesePolishRussianVietnameseTurkishUkrainianChineseJapaneseKoreanArabicPersianThaiHindi
Company

Behind Monica

Company name
Butterfly Effect Pte. Ltd.
Founded
25/02/2023
Country of origin
🇺🇸 United States
Headquarters
455 Market St Ste 1940, PMB 846230, San Francisco, CA 94105-2448, USA
UBO
INFORMATION_NOT_FOUND
UBO country
INFORMATION_NOT_FOUND
Domain registrar country
INFORMATION_NOT_FOUND
Legal contact
Support contact
Official links

Resources

All the official URLs gathered for verification and reference.

Compare

Alternatives

Tools that compete with or complement Monica.

C ChatGPTC ClaudeM Microsoft CopilotG Gemini
FAQ

Frequently asked questions

What exactly is Monica?
An all-in-one AI assistant that aggregates third-party models such as GPT, Claude, Gemini, Sora and Nano Banana behind a single interface, delivered as a browser extension, desktop and mobile applications and a web app.
Is there a free version?
Yes. The free plan is permanent, not a time-limited trial. It applies a daily query quota that resets at midnight, and reserves the advanced models for paying tiers.
How much does it cost?
The only price the publisher makes public is 16.60 USD per month for the Unlimited tier, quoted on its comparison pages. The pricing page renders through JavaScript, so the amounts for the Pro, Premium and Team tiers are not published in a readable form.
Where can I use it?
On Chrome and Edge as an extension, on macOS and Windows as a desktop application, on iOS, iPadOS and Android, in a web browser, inside VS Code and JetBrains IDEs, and through WhatsApp, Messenger, Line and Telegram.
Which models can I reach?
The catalogue includes GPT-5.5 and its variants, Claude 4.7 Opus and Fable 5, Gemini 3.1 Pro, Grok 3, Mistral, and for images and video Sora 2, Veo 2, DALL-E 3, Stable Diffusion, Flux, Ideogram and Nano Banana.
Is there an API?
Yes. Monica Open API is a separate multi-model platform with its own account and prepaid balance. A consumer subscription does not grant API access, and failed calls are not charged.
Are my conversations used to train models?
The publisher says it trains no foundation model of its own, and the API states data is not used for training and is deleted after thirty days. The terms are less absolute: they grant a perpetual licence to use content in aggregated form and warn that third-party AI providers may retain rights over it.
Where is my data hosted?
In the United States, where the privacy policy places the servers and central databases. No European hosting region or data residency option is offered.
Is there a minimum age?
Yes, 18. The terms require users to be adults, sign-ups below that age are blocked, and accounts are deleted once under-age use becomes known.
Can I get a refund if I cancel?
As a rule, no. Payments are declared final and non-refundable; a partial refund on unused credits is possible but remains at the publisher's sole discretion. Cancelling stops renewal without refunding the current period.
Conclusion

Should you pick Monica?

Monica is one of the broadest consumer AI assistants on the market, and its central idea holds up: instead of subscribing separately to several vendors, you pay once and reach GPT, Claude, Gemini, Grok and a long list of image and video engines from the same sidebar. The one-click comparison of answers is a real differentiator, and the coverage across browser, desktop, mobile, IDEs and messaging apps means the assistant is genuinely where the work happens. A permanent free plan makes the whole toolbox testable before any payment, and the claimed ten million users suggest the execution matches the ambition.

The reservations are all about transparency rather than capability. The pricing page publishes no amount without JavaScript, so the only verifiable price is the 16.60 USD Unlimited tier quoted on comparison pages, while cheaper tiers named in the page's own code stay invisible. There is no about page, no named team, no social presence, and a single private mailbox in San Francisco stands in for a company incorporated in Singapore. More seriously, the commercial pages advertise conversations as fully private while the terms grant a perpetual, irrevocable licence to use content in aggregated form and warn that third-party AI providers may keep rights over what is sent to them. No subprocessor list, no security certification, no Article 27 EU representative and United States hosting complete the picture.

For an individual who wants maximum capability per euro, Monica is a strong and honest choice. For a team handling client material or personal data under European rules, the gap between the marketing and the contract is worth reading closely before committing.