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Market data is refreshed once per day from public sources. Information may be incomplete or outdated — verify independently before making decisions. This is not investment advice.
Evidence-bound summary — expand sections for movement, risks, and signals.
Memo snapshot · May 20, 2026, 6:27 PM
What would change this read
DealFlow OS uses public web data and automated enrichment. Research may be incomplete, outdated, or incorrect. Verify important information before making investment or outreach decisions.
TL;DR
Seed (YC)Costream Landing page for dialogue indexing product.
Latest: Pre-seed. Investors: Y Combinator. (High).
Funding
Latest: Pre-seed. Investors: Y Combinator. (High).
Product / news
1 product/news‑styled row(s); headline risk without filings (High).
Verified facts
Summer 2025 batch; indexes human dialogue inside digital products for analytics.
Weak funding evidence: mention does not include a parsed raise amount/round and may refer to non-funding context.
No open roles indexed yet.
The index price and activity score are algorithmic estimates based on observed public company-level signals. They may be incomplete, stale, or inaccurate and are not investment, legal, tax, or business advice.
Source types found
Strongest / recent news-style rows
Wed, May 20, 06:27 PM · confidence 88%high quality
Wed, May 20, 06:27 PM · confidence 85%medium quality
wikipedia · Mon, Jun 29, 01:57 AM · confidence 50%low quality
Newest first · 8 event(s)
Summer 2025 batch; indexes human dialogue inside digital products for analytics.
Source: npm_registry
A high-performance streaming programming language for parallel architecture. This repo (js-version) is created for better using & reading & debugging.
Press coverage of dialogue-indexing vision.
2 row(s)
The company's own site — the authoritative description of what they sell and to whom. Marketing-controlled, so treat claims as positioning rather than verified traction.
Costream - San Francisco, USA
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗Costream Costream San Francisco USA © Costream 2025 Contact founders@costream.ai
Why it matters: Primary source — the company's own positioning; best read for what they sell and to whom, not for traction claims.
Open source ↗3 row(s)
Third-party press coverage. Independent reporting corroborates company claims; repeated coverage across outlets is a momentum signal.
Press coverage of dialogue-indexing vision.
Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗Why it matters: Independent coverage — third-party corroboration of company claims; recurring coverage indicates rising visibility.
Open source ↗1 row(s)
Funding announcements and investor-database records. The strongest public signal of capitalization: round, amount, and syndicate quality when disclosed.
Summer 2025 batch; indexes human dialogue inside digital products for analytics.
Why it matters: Funding signal — Pre-Seed per this source; verify against the linked original before relying on it.
Open source ↗2 row(s)
Public engineering activity. Sustained commits, releases, and stars indicate real product development and, for dev tools, developer adoption.
Streams, the way they should be
Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
Open source ↗A high-performance streaming programming language for parallel architecture. This repo (js-version) is created for better using & reading & debugging.
Why it matters: Engineering signal — public repo activity evidences active development and possible developer adoption.
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