No. 48 on the indexDeveloper toolsLaunched 20252025

Zernio
One API for posting, ads, inbox and messaging across social platforms (formerly Late).
What it is
Zernio, which launched as Late (getlate.dev), is a developer API that wraps the official APIs of Instagram, TikTok, LinkedIn, YouTube, X, Facebook and more, so products and AI agents can publish posts, run ads and handle messages through one integration. It grew mainly through SEO and Google search ads.
How it was built with AI
Founder Miquel Palet told Starter Story that the most important tool behind the product is Claude Code, which lets the team code much faster.
Traction
Self-reportedJust crossed $40K MRR about seven months after launch, with 700+ paying users and 50K signups, per the founder (March 2026)
As of Mar 4, 2026. Stated by the founder or the tool maker. Not independently verified. Read the source
Sources
- 01Zero to $40K/Month With One Marketing Channel (No Social Media)YouTube (Starter Story) · Mar 4, 2026 · checked Nov 2, 2026
- 02Late is now ZernioZernio · checked Nov 2, 2026
- 03Zernio - Marketing Infrastructure for AgentsZernio · checked Nov 2, 2026
More developer tools built with Claude Code
- 8SocialCrawlOne API for social media and web data from dozens of platforms, ready for AI agents.Developer tools · Claude Code
- 39CNVSA voice-controlled Mac canvas for running Claude, Codex and Cursor agents side by side.Developer tools · Claude Code
- 55BridgeMindAn "agent super app" for running coding agents side by side, vibe-coded live on stream.Developer tools · Claude Code
- 64NinjaPearReal-time B2B company and people data for AI agents, via API and MCP.Developer tools · Claude Code