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.
Deck prep
10 listedRead 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.
Lenny Skills
1,319★ · MITstructure. 76 PM and founder skills including fundraising and exits playbooks.
Open on GitHub →ppt-agent-skills
893★ · no licenceshown. Generates PPTX decks from prompts, with roadshow templates.
Open on GitHub →claude-skills-founder
89★ · MITFounder skills pack including fundraising scaffolding; synthesis, not cited primary sources.
Open on GitHub →fluiddocs-deck-builder
30★ · MITDeck-builder skill for generating investor-facing docs from prompts.
Open on GitHub →vc-skills
30★ · MITSimulates 28 named VCs reviewing your deck — useful second opinion after nock, not sourced firm doctrine.
Open on GitHub →Investor research
3 listedThis bucket is genuinely thin, and that's the most useful thing on the page.
awesome-oss-investors
473★ · MITlists 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.
Open on GitHub →openbook
64★ · MITOpen attempt at a public VC database via scrapers (dataset on DoltHub) — build your list, don't expect a finished CRM.
Open on GitHub →awesome-startup-fundraising
7★ · MITVendor-curated fundraising resource list — thin, but a starting map of the landscape.
Open on GitHub →Outreach
4 listedWe'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.
ECC
256,281★ · MITA 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.
Open on GitHub →Outreachr
259★ · Apache-2.0The 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.
Open on GitHub →venture-ops
7★ · MITLightweight venture-ops / fundraising ops skills for pipeline hygiene.
Open on GitHub →founder-fundraising-outreach
5★ · MITFundraising outreach skill with multiple email modes including stall recovery — young pilot, list it honestly.
Open on GitHub →`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
3 listedPapermark'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.
Papermark
9,158★ · AGPL-3.0By 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.
Open on GitHub →due-diligence-portal
1★ · Apache-2.0A single Docker container with NDA gating and an audit log. Genuinely nice shape for a small raise. You are the QA team.
Open on GitHub →YC SAFE documents
See notesfree, no stated licence, the closest thing to a default in pre-seed financing.
Visit site →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.