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Belin Doc vs Cotypist

Which one should you try?

Belin Doc

Freemium

Best for Students and researchers working with international documents

Visit Belin Doc See full review

Cotypist

Freemium

Best for macOS-only writers with daily writing volume

Visit Cotypist See full review

Pricing, capabilities and platforms side by side. Prices are as of the "Pricing checked" date in the table.

Belin Doc

Belin Doc

The vendor describes Belin Doc as a document translation service focused on format preservation — meaning the translated output mirrors the original layout rather than stripping it to plain text. The free tier, which the docs confirm at 500 pages per month plus an optional daily quota, handles a realistic research or student workload without a credit card. For heavier volume, paid tiers and one-off credit packs fill the gap. The ceiling appears when documents contain highly complex mixed-language tables or custom fonts; community reports suggest those cases require manual cleanup post-export. Teams pushing multilingual document pipelines at scale will hit rate limits before building any real automation, since no API is available.

Cotypist

Cotypist

Cotypist sits in the macOS menu bar and surfaces word-completion suggestions as you type, accepted with a Tab keystroke, across whichever apps you have open. The differentiating mechanic is per-app instruction profiles: you teach it one voice for client emails, a different register for pull-request descriptions, and it holds those rules separately per application. On-device processing keeps your keystrokes off external servers. The free tier caps daily output at 100 words — a ceiling that arrives fast for anyone with real writing volume. No API, no Windows build, no self-hosting path exists.

AttributeBelin DocCotypist
PricingFreemiumFreemium
PricePro $19/month or $190/year; Max $59/month or $590/year (one-time purchases, not subscriptions); passes from $1.50/day; free 500 pages/month$6/mo or $9/mo
Pricing checkedOct 19, 2026Jun 11, 2026
Free trialNot stated30 days
Open sourceNoNo
Has APIYesNo
Self-hosted optionNoNo
PlatformsWeb-based, browser-accessiblemacOS (Apple Silicon only)
Released2025—
Pros
  • Format preservation on upload, so a two-column research paper or a table-heavy technical manual comes back in the same layout — not a wall of unsorted text you have to reformat before it is usable.
  • 500 pages per month on the free tier, confirmed in the vendor FAQ, which means a student or researcher translating one or two papers a week never hits a paywall for normal use.
  • Optional daily quota on the free tier gives consistent access spread across the month rather than a hard monthly cliff that cuts off mid-project.
  • Credit packs available outside subscriptions, so a team with a one-off contract needing 2,000 pages translated does not get locked into a recurring subscription to cover a temporary spike.
  • Covers high-stakes document types — certificates, legal filings, travel documents — where layout and field alignment carry legal or administrative weight, not just readability.
  • Per-app instruction profiles let you maintain a different writing register for each application, so client emails, Slack messages, and code comments each get the voice you set without manual switching.
  • On-device processing means your keystrokes and draft content are not transmitted to external servers, which matters for anyone working with confidential documents or under data-handling obligations.
  • Tab-to-accept inline completions work inside whichever Mac app has focus, so you never break flow by switching to a separate chat window or sidebar.
  • Multi-Mac profile sync at the paid tier means your per-app voice configuration carries across machines, avoiding the tedious work of reconfiguring from scratch on a second device.
Cons
  • No API exists, which means every translation is a manual upload. The moment your team needs to trigger translation from code — say, a document hits a SharePoint folder and you want the translated copy automatically — Belin Doc is a dead end and you are moving to a service like DeepL API or Google Cloud Translation.
  • Documents are processed on the vendor's cloud with no self-hosted option. Legal teams handling privileged communications or medical teams processing patient records will hit a compliance wall before they hit a page limit.
  • Format preservation breaks on highly complex PDFs — custom fonts, mixed-direction text, layered graphics. Those documents come back needing manual layout repair, at which point the time saved on translation is spent on cleanup.
  • No programmatic output means no downstream automation: the translated file lives in your downloads folder, not in a connected workflow. Teams building any kind of multilingual content pipeline will maintain a parallel manual step indefinitely.
  • The free tier's 100-words-per-day cap cuts off mid-session for anyone with real writing volume — a journalist drafting a single article, a developer writing commit messages all morning, or a support agent handling a ticket queue will exhaust it before noon and face a choice between upgrading or stopping.
  • There is no Windows version, no Linux path, and no browser extension, so any team that runs a mixed OS environment cannot standardize on this tool — the realistic next step is a browser-based assistant like a Chrome extension that works across platforms.
  • No API means completions cannot be scripted into a build pipeline, a CMS workflow, or any automated process — teams that want completion suggestions integrated into custom tooling have no integration surface and will need a provider that exposes one.
  • The passive suggestion model offers no ability to run multi-step tasks, draft from a prompt, or trigger actions — writers who need to generate a full first draft rather than complete sentences in progress will find the interaction model too narrow and reach for a dedicated generation tool.

Made up your mind?

Belin Doc

Freemium

Best for Students and researchers working with international documents

Visit Belin Doc See full review

Cotypist

Freemium

Best for macOS-only writers with daily writing volume

Visit Cotypist See full review

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Specs come from each tool's own site and docs (how we test). AIDiveForge is editorially independent.

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