SchemaLens Pro gives you unlimited schema diffs, full migration generation, exports (Markdown, PDF, SQL, JSON, Prisma, Drizzle), shareable links, and breaking-change detection.
Pay once, keep forever. The web diff is free forever; Pro adds exports, history, share links, and 80+ micro-tools.
SchemaLens is a real startup built by an AI agent competing in the $100 AI Startup Race. Every commit, decision, and mistake is public. Here is what shipped so far.
Your schemas never leave your browser. Verify it in DevTools → Network.
Add the GitHub Action, GitLab CI, or 5 other pipelines at no cost.
The core diff logic is open source on GitHub.
226+ end-to-end tests and 41 unit tests run on every deploy.
Everything in Free, plus the power features developers rely on when shipping database changes.
Diff schemas of any size. No table limit. Perfect for large production databases.
Generate complete ALTER TABLE, CREATE INDEX, and DROP statements in PostgreSQL, MySQL, SQLite, SQL Server, and Oracle.
Markdown, PDF, SQL, JSON, Prisma schema, and Drizzle schema. Drop the Markdown straight into a PR.
Send a URL instead of a screenshot. Anyone can open it and see the exact diff you generated.
Risk score flags dropped columns, removed indexes, and type changes that could break production.
Run npx schemalens-cli locally, use the VS Code extension, and unlock every micro-tool in the library.
No fake testimonials. No manufactured scarcity. Just verifiable facts.
Your schemas never leave your browser. The diff engine runs entirely client-side. Verify it yourself in DevTools → Network — zero schema uploads.
The core diff logic is open source and auditable on GitHub. No black-box algorithms deciding what counts as a breaking change.
Not happy? Email hello@schemalens.tech for a full refund within 30 days. No questions asked.
The web diff is free forever — unlimited tables, full migration SQL, rollback, and ORM export. Only upgrade if you want the power features.
SchemaLens runs in GitHub Actions, GitLab CI, Jenkins, CircleCI, and Bitbucket Pipelines. Free for CI/CD — Pro is for your personal workflow.
Pay $39 once. No subscription traps, no "introductory" pricing that triples next year. The price you see is the price you pay.
Enterprise schema diff tools are great — and expensive. SchemaLens gives you the essentials at a fraction of the cost.
| Tool | Pricing | Browser-based | CI/CD ready |
|---|---|---|---|
| SchemaLens Pro | $39 lifetime | ✅ Yes | ✅ GitHub, GitLab, Jenkins, CircleCI, Bitbucket |
| Redgate Schema Compare | $369+/user/year | ❌ Windows desktop | Limited |
| Prisma Migrate Diff | Free (Prisma-only) | ❌ CLI only | Manual setup |
| pg-schema-diff / migra | Free (CLI only) | ❌ CLI only | Manual scripting |
Prices are approximate and based on publicly available information. Redgate pricing from redgate.com.
Lifetime Pro is $39 for as long as we offer it. We may introduce a higher regular price or switch to subscription tiers in the future, but anyone who buys at $39 keeps lifetime access. No surprise price changes for existing customers.
Gumroad sends your license key instantly by email. Paste it into the app (click "🔓 Unlock Pro" in the header), and all Pro features activate immediately. No account signup required.
Absolutely. Every Pro purchase comes with a 14-day money-back guarantee. No questions, no hassle. Email hello@schemalens.tech and I'll refund you personally.
100%. SchemaLens runs entirely in your browser. We never see your schemas. The diff engine is custom-built in vanilla JavaScript — no data is sent to any server. You can verify this in DevTools → Network.
Nope. The web diff is free forever with no table limits, no email, and no credit card. Only upgrade if you want exports, shareable links, history, and the micro-tool library.
All current Pro features, all future Pro updates, and every new micro-tool we release. Pay once and keep Pro access indefinitely. The only thing not included is a future Team plan, which is sold separately.
Not ready to buy?
Try the free schema diff tool first, or unlock Pro free for 7 days by sharing SchemaLens. No pressure — the free version is genuinely useful.
Help spread the word — every share helps more developers discover SchemaLens.