Developer tools decision
Koldinfo
The visible functionality is an auth-backed web app; a single capable developer can implement and run a minimal hosted replacement in about a week using existing open-source auth projects and managed Postgres/email providers.
Visit website↗Not priced
No pricing page we fetched carried a figure, so there is nothing to compare against. The build side is still real.
$50one-off24 h to build
$0/mo3 h/mo upkeep
No published price to break even against.
Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need - the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship. All Koldinfo alternatives, with the arithmetic →
What a replacement has to do
- Authenticate users, serve a simple per-user dashboard, accept sign-ups and password resets, store user accounts and basic profile data.
What it still won’t have
- Hosted service and uptime SLAs
- Vendor-managed backups and platform updates
- Any proprietary server-side features or business rules not visible on the sign-in page
- Vendor support beyond the published support email
What remains hard
- Product polish and ongoing maintenance
First-year cost
No published price
Koldinfo does not publish a price we could read, so there is nothing to compare against. What building costs is below.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a simple user-centric web app for sign-up, sign-in, and a minimal per-user dashboard using Next.js (React) + PostgreSQL (managed, e.g., Supabase or self-hosted) and GoTrue or Supabase Auth for authentication. Core features in scope: email/password sign-up, email verification, sign-in with sessions/JWT, forgot-password flow with transactional email via an SMTP provider (SendGrid/Mailgun), a protected dashboard page that shows basic profile data, and an admin script to export users. Out of scope: any undocumented business logic, analytics beyond basic request logs, and third-party social login. Require HTTPS deployment (Vercel, Fly, or Docker on a VPS), environment-based configuration, server-side input validation, error handling and retries for email delivery, automated tests for auth flows, and CI for deployment.
How we checked
How the score was reached
- Build verdict base78
- An open-source build was found+5
- 4 cited sources+3
- Evidence score86
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time - so the same evidence always produces the same number.
How scoring works →Cited sources · 4
Every page the run actually retrieved.
- official productKoldinfo app (sign in page)
- official productKoldinfo support contact on sign-in page
- open sourcekeycloak/keycloak
- open sourcecasdoor/casdoor
Integrity checks
What held up, and what did not.
