Network-driven intelligence
The data room never tells the full story.
The Side Letter continuously gathers primary intelligence from leading funds, allocators, and data partners. We use AI to synthesize and surface insights that help our clients access opportunities earlier, and make better informed decisions.
TSL data products are available via platform or MCP.
Example · pull a fund packet
get_fund({ "name": "Harbor Ventures II" }) // Response { "last_tsl_checkin":"Aug 2026 · call with GP", "peer_set":"Defense & Dual Use · $25-75M", "clears_bar":true, "backed_by":["2 fund of funds", "3 family offices"], "outlier_potential":["Tidewater Sensing", "Kestrel Autonomy"], "caveat":"3.1x TVPI rests on one 2021 position", "still_open":["GP commit structure?"] }