Zeplin
Invision
Axure
Balsamiq
Proto.io
Flinto
Webflow
Moqups
specgit
Notion
Confluence
GitBook
Mintlify Writer
Obsidian.net
Docusaurus
Dropbox Paper
Docs go stale when they live away from the code. Today the spec lives in a doc app, the code in GitHub; engineers get a Slack link, read it once, and build from the ticket โ then the doc no longer matches reality.
specgit is the PM-friendly layer on top of GitHub. You write the spec like a regular doc. Engineers review it as a pull request โ same flow, same tools, same habits. Every update is a commit. Every discussion is on the record. The doc sits where engineers and AI coding agents already look.
How it works - Saves are commits - Comments are PR review threads - Publish is a merge
Docs never leave your GitHub.
Write without Git or Markdown - Visual editor โ no Markdown or Git required - Inline comments and live collaboration - Full history โ every change is a commit - Starter templates (product spec, decision record, meeting notes) - Import Word, PowerPoint, Excel, and PDF (via Microsoftโs MarkItDown) - Obsidian Markdown (wiki links, callouts, Mermaid; unknown syntax preserved) - View changes โ Word-style redlines against main
GitHub-native review When a repo requires approving reviews, specgit shows whatโs needed, authors can request review; reviewers approve or request changes in-app. โPublish when approvedโ goes live on approval. Works with branch protection and rulesets.
specgit AI (optional) Agent chat, Review, and Triage โ text or voice. Only when invoked; every change needs your approval. Never trains models. FreshSpec โ early access on request.
Privacy - Documents stay in GitHub; no long-term copy on our side - No analytics, ad tracking, or third-party tracking - Sign-in via the specgit GitHub App โ fine-grained, repo-by-repo tokens
Pricing - Free โ 1 repo, 5 publishes/month, unlimited collaborators. No credit card. - Pro โ $8/seat/month ยท Pro Plus โ $16/seat/month - Viewing and commenting always free.
Try the real editor (no sign-up): https://specgit.com
Zeplin
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Zeplin is best suited for designers and developers working in teams where clear design specifications and organized collaboration are critical. It's particularly beneficial for teams using Figma, Sketch, or Adobe XD who want to ensure precise design implementation and reduce misunderstandings between design and development departments.
Based on our record, Zeplin seems to be more popular. It has been mentiond 23 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Tools like Zeplin's AI layer, Supernova, and the emerging generation of Figma plugins with AI backends do this today. The output is not a PDF full of screenshots. It is structured data: exact values, token references, and context โ the kind of thing a developer can act on without a follow-up conversation. - Source: dev.to / 4 months ago
Zeplin.io AI-powered design-to-dev handoff. - Source: dev.to / about 1 year ago
Additionally, thank you to all our community launch partners across the frontend ecosystem for helping us bring Storybook 8 to the world! Thanks to Chromatic, Figma, ViteConf, Omlet, DivRiots, story.to.design, StackBlitz, UXpin, Nx, Mock Service Worker, Anima, Zeplin, zeroheight, kickstartDS, and Kendo UI. - Source: dev.to / over 2 years ago
Designers would often use separate tools like Zeplin or Invision to handoff the designs to developers.๐ฎ. - Source: dev.to / over 2 years ago
Zeplin โ Designer and developer collaboration platform. Show designs, assets, and style guides. Free for one project. - Source: dev.to / over 2 years ago
Invision - Prototyping and collaboration for design teams
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Axure - The most powerful way to plan, prototype and hand off to developers, all without code. Download a free trial and see why professionals choose Axure RP 9.
Confluence - Confluence is content collaboration software that changes how modern teams work
Balsamiq - Balsamiq. Rapid, effective and fun wireframing software.
GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.