Best Open-Source Fundraising Skills, Plugins & AI Agents (Updated Weekly)
Last updated: September 11, 2026. Reviewed weekly.
If you're picking three open-source fundraising tools today: Papermark as your data room (AGPL-3.0, the most battle-tested DocSend replacement there is), Outreachr as your investor CRM (Apache-2.0, local-first, actual software rather than a prompt pack), and nock to pressure-test your deck before an investor does it for you.
One honest framing before the list. Fundraising is the thinnest of the four open-source categories we track, and it's thin in a specific way: deck-prep skills are abundant and mostly interchangeable, while investor data — the thing that would actually save you a week — is almost entirely locked behind paid APIs. We mark where the shelf is empty rather than padding it.
Timing note, because it's the reason you're reading this. Y Combinator's Winter 2027 application window closes November 2, 2026 at 8pm PT — seven weeks. Techstars' synchronized Spring 2027 deadline is November 18. Both are on our events, grants and fundraising deadlines page, verified the same day as this one: https://codalio.com/blog/startup-events-grants-fundraising-deadlines
Every star count here is current as of September 11, 2026 — the first complete read this page has had. It settles a number we flagged as disputed last week, and the answer is not the one we guessed.
Deck prep
Lenny Skills — 1,319 stars, MIT structure. 76 PM and founder skills including fundraising and exits playbooks.
ppt-agent-skills — 893 stars, no licence shown. Generates PPTX decks from prompts, with roadshow templates.
claude-skills-founder (89, MIT), fluiddocs-deck-builder (30, MIT), vc-skills (30, MIT — simulates 28 named VCs), cc-skills-vc-fundraising (24, MIT), nock (10, MIT), founder-skills (9, MIT), pitch-deck-mastery-skill (8, MIT), startup-problem-finder (6, MIT).
OpenStartupModel's cap table is a free spreadsheet with no licence at all.
The one we'd install first: nock. Every other tool in this group writes slides. nock tells you which slide will get you killed — it's built from one seed investor's questions across 53 real pitch and diligence meetings. Fixing a deck is easy; knowing what's actually broken in it is not. Honest limitation: it's one investor's lens, narrow and idiosyncratic by design. Run it and then run vc-skills for a second opinion, and remember that vc-skills' "firm personalities" are the author's characterisation, not sourced from those firms.
New flag: ppt-agent-skills shows no licence. At 893 stars it's the second-largest entry in this group, and GitHub resolves no licence for it. Last week we printed "MIT" on the strength of its README. It generates decks you might send to an investor, so read the repository yourself before relying on it commercially.
Read the small print on two more. OpenStartupModel calls itself open source and carries no licence — it's a law firm's goodwill marketing, marked "educational purposes only." And cc-skills-vc-fundraising and claude-skills-founder each have four commits and describe themselves as grounded in Sequoia and a16z frameworks; that's the author's synthesis, uncited. Useful scaffolding, not authority. Both grew this week, which changes nothing about that.
Investor research
This bucket is genuinely thin, and that's the most useful thing on the page.
awesome-oss-investors (473, MIT) lists 80+ VCs investing in commercial open source with ticket sizes — genuinely good, but last committed well over a year ago, so ticket sizes and fund status will have drifted. openbook (64, MIT, last pushed August 1) scrapes and publishes an open VC database. awesome-startup-fundraising (7, MIT) is vendor-curated. OpenVC is proprietary with a free tier.
The one we'd start with: openbook. The only genuinely open, actively maintained attempt at a public VC database rather than a static list or a freemium funnel. The honest limitation is big: the repository holds scrapers, not rows. The dataset lives on DoltHub and we couldn't render that page to confirm its size or freshness, so treat this as a tool for building your own list, not a list.
For most founders the pragmatic answer is OpenVC's free tier — 16,000+ investor profiles, filterable by thesis, exportable. It isn't open source and we're saying so rather than smuggling it into an open-source list.
What's missing: there is no open-source thesis-matching agent. Nothing takes your company and returns a ranked, reasoned investor list. Every MCP server in this space — Crunchbase, Affinity, Harmonic — is a thin client for a paid proprietary API.
Outreach
ECC — 256,281 stars, MIT. A 286-skill, 68-agent harness; the fundraising pieces are two skills inside it. A heavy install for a small payload unless you were adopting the whole thing anyway.
Outreachr — 259 stars, Apache-2.0, v0.1.1, 41 commits. Local-first investor CRM: relationship mapping, warm-intro planning, email approval workflow, pipeline.
venture-ops (7, MIT) and founder-fundraising-outreach (5, MIT).
The one we'd install first: Outreachr. The only tool in this category that's an actual investor CRM rather than instructions for writing emails. Apache-2.0 and local-first, with investor data in a local SQLite vault and encrypted secrets. Honest limitation: v0.1.1, about six weeks old, and the macOS and Windows builds are unsigned and unnotarised — you'll click through security warnings to install something that will hold your investor pipeline.
Last week's disputed number is settled, and we were wrong about which figure was wrong. We recorded 238 stars from the API on August 28, then a hand-check on September 4 appeared to show 6 stars and 10 commits, so we marked it disputed and told you you'd be adopting a six-star project. The correct figure is 259 stars and 41 commits. The API was right all along; the hand-check was the error — almost certainly a misread of a partially-rendered page, which is exactly the failure mode we warn about elsewhere when we tell you not to trust rendered GitHub counts.
We're leaving the history visible rather than quietly swapping the number, because the correction cuts against us twice: we published a wrong figure, and we published it in the direction that made a tool we recommend look weaker than it is. If you skipped Outreachr last week because this page called it a six-star project with ten commits, that was our mistake. Still young, still unsigned, still a real bus-factor risk — but not the thing we described.
The underlying argument hasn't changed: in a category this small, low adoption is information rather than disqualification. A genuinely useful tool here might have 10 stars where a coding tool has 100,000.
founder-fundraising-outreach is a competitor's skill and it's real: MIT, self-contained, eight distinct email modes including stall recovery, which is the mode most founders actually need and never plan for. It's also three commits old and tagged v0.9 pilot. We'd rather list it honestly than pretend it doesn't exist.
Data room and diligence prep
Papermark — 9,158 stars, AGPL-3.0, 5,000+ commits. Self-hosted data room with per-page view analytics.
due-diligence-portal — 1 star, Apache-2.0. A single Docker container with NDA gating and an audit log. Genuinely nice shape for a small raise. You are the QA team.
YC SAFE documents — free, no stated licence, the closest thing to a default in pre-seed financing.
The one we'd install first: Papermark. By a wide margin the most battle-tested open-source DocSend replacement. The per-viewer page analytics are exactly what you want during a raise — knowing which investor spent four minutes on your financials changes your follow-up. Honest limitation: self-hosting means Postgres, blob storage and SMTP wiring. Budget an afternoon of infrastructure, not a one-click deploy. There's a paid hosted tier if you'd rather not.
Papermark's move has completed cleanly: mfts/papermark redirects to papermark/papermark, both report the same 9,158 stars, licence unchanged. Update any pinned remote.
On the YC SAFE: free, standard since the post-money version in 2018. It carries no licence grant and it is not a substitute for a lawyer — it's a starting document that saves your lawyer time. If you're applying to Winter 2027, read it before November 2, not after.
What didn't make the list
captableinc/captable — self-hostable cap table management, last pushed June 2025 with cap-table management itself still marked work in progress. Over a year stale on something this consequential isn't "stable", it's abandoned in place. selcuke/venture-capital-firms-list — last pushed May 2019, no licence. Seven-year-old VC contact data is worse than none. Graphite Financial's "open source financial model" — no licence anywhere and the download gated behind a form. That's a lead magnet. Open-Term-Sheet / SAFE-Note-Translations — five-year-old legal documents are actively dangerous, not merely stale. Crunchbase MCP server — a thin client for a paid key, so no free path.
Frequently asked questions
How often is this updated? Every week. Entries we cannot verify are removed or flagged rather than quietly kept.
Is this the full page? Yes — this interactive page is the canonical living guide; Substack carries the same weekly refresh.
What changed this week
Settled the Outreachr dispute, against ourselves. 259 stars, 41 commits, v0.1.1. The August 28 API reading was substantially right; the September 4 hand-check was the error. We told readers they'd be adopting a six-star project — that was wrong, and if it put you off a tool we otherwise recommend, the mistake was ours.
New licence flag: ppt-agent-skills (893 stars) shows no licence. We printed "MIT" last week on the strength of its README. GitHub resolves nothing.
First complete star audit this page has had. All 19 GitHub entries read September 11. Notable: Lenny Skills 1,287 → 1,319, claude-skills-founder 66 → 89, ECC 243,927 → 256,281, Papermark 8,980 → 9,158.
Papermark's move confirmed complete. Old path redirects, identical figures, AGPL-3.0 unchanged.
Timing updated: YC Winter 2027 is now seven weeks out. Techstars Spring 2027 is November 18.
Where the shelf is still empty: no open-source thesis-matching agent; no free path to investor data; the best cap-table tool remains stale. Unchanged, and unlikely to change soon.
