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  "markdown": "Angel investor.\n\n## Companies on Anchor Terminal\n\n- **Inngest**\n  - [Inngest](https://www.anchorterminal.com/tools/inngest.md), graded B, 66.1/100\n  - Source: https://www.inngest.com/about\n- **PlanetScale**, Series C, November 2021\n  - [PlanetScale MCP Server](https://www.anchorterminal.com/tools/planetscale-mcp.md), graded B, 66.6/100\n  - Source: https://techcrunch.com/2021/11/16/planetscale-raises-50m-series-c-as-its-enterprise-database-service-hits-general-availability/\n- **Railway Corporation**\n  - [Railway MCP Server](https://www.anchorterminal.com/tools/railway-mcp-server.md), graded C, 56.7/100\n  - Source: https://blog.railway.com/p/series-a\n- **Supabase**, Series A, October 2021\n  - [Supabase API + MCP](https://www.anchorterminal.com/tools/supabase-mcp.md), graded BB, 75.6/100\n  - Source: https://supabase.com/blog/supabase-series-a\n- **tldraw**, Seed, November 2022\n  - [tldraw SDK + MCP](https://www.anchorterminal.com/tools/tldraw.md), graded C, 60.8/100\n  - Source: https://tldraw.dev/blog/announcing-tldraws-seed-round\n\n## Where they invest\n\n- Databases \u0026 files, 2\n- Human approval \u0026 handoff, 1\n- Cloud \u0026 infrastructure, 1\n- Diagramming, 1\n\n## Founders they backed\n\n- [Jake Cooper](https://www.anchorterminal.com/people/jake-cooper/), Railway Corporation\n- [Paul Copplestone](https://www.anchorterminal.com/people/paul-copplestone/), Supabase\n- [Ant Wilson](https://www.anchorterminal.com/people/ant-wilson/), Supabase\n\n## Questions\n\n### Which AI tools has Tom Preston-Werner invested in?\n\nAnchor Terminal lists Inngest, PlanetScale, Railway Corporation, Supabase and tldraw backed by Tom Preston-Werner.\n\n### How are Tom Preston-Werner's companies graded?\n\nOn Anchor Terminal's benchmark, Inngest (B, 66.1), PlanetScale MCP Server (B, 66.6), Railway MCP Server (C, 56.7), Supabase API + MCP (BB, 75.6) and tldraw SDK + MCP (C, 60.8).\n\nInvestors are named from the companies' own announcements, the investors' own pages, Y Combinator's company pages, public filings and news reports of a round, each with its source. An investor isn't a sign of quality, and nobody can pay to be listed or to change a grade. To correct something or have a page removed, write to privacy@anchorterminal.com.\n",
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