Comparison

The open-source alternative to closed sourcing platforms.

This compares FastVC against the early / signal-based deal sourcing and company discovery category. Every alternative below is proprietary SaaS running on a vendor's infrastructure; FastVC is Apache 2.0 and runs on yours. Financial-depth databases and relationship CRMs do a different job — they appear in the gap analysis as complements, not rivals.

★ Apache 2.0 on GitHub ↗
FastVC Harmonic.ai Specter Frontrun Inven
Licence Open source — Apache 2.0, the whole system Proprietary SaaS Proprietary SaaS Proprietary SaaS Proprietary SaaS
Self-host Yes — your infrastructure, your database Vendor cloud only Vendor cloud only Vendor cloud only Vendor cloud only
Auditable logic Every agent prompt, tool and scoring rule is readable and editable Scoring and ranking are closed Signal weighting is closed Convergence logic is closed Classification model is closed
Primary edge Open-source agentic workflow over your own fund data Breadth of proprietary company + people index Cross-channel growth signals Investor follow-graph convergence on X AI reading of company websites at scale
Core dataset Bring your own — your pipeline, cap tables, data room, plus public registries 35M+ companies, 195M+ people profiles Company, web traffic, hiring and product signals 1,000+ venture investors' following behaviour 28M+ company profiles, website-derived
Earliest signal Depends on the sources you connect Formation and stealth, talent movement Growth inflection across web / hiring / product Pre-round — months before announcement What a company actually does, not its SIC code
AI agent Specialist squad across the whole lifecycle Scout — research, market maps, outreach drafts AI search and scoring Prompt-to-founder-contact flow AI search and list building
Beyond sourcing Round modelling, diligence, IC memos, LP relations, portfolio ops Primarily discovery and research Primarily discovery and signals Primarily discovery and outreach Discovery plus M&A/PE workflows
Best fit Funds that want one system from thesis to IC and LP reporting Institutional VCs with dedicated sourcing teams Emerging managers on consumer and SaaS Solo GPs and small funds wanting early edge cheaply M&A, PE and mid-market corporate development
Pricing shape BYOD; self-host or hosted Enterprise / quote-based Mid-market subscription From ~$49/mo Subscription, not publicly listed

Competitor details reflect publicly published positioning as of August 2026 and change often — treat them as a starting point, not a datasheet.

Gap analysis

An honest read of the trade-offs.

Where FastVC is strong

  • • Open source under Apache 2.0. Every one of the alternatives is a closed proprietary platform — you can read FastVC's sourcing logic, fork it, and run it on your own infrastructure.
  • • No vendor lock-in: your data stays in your database, and you can point the squad at your own LLM endpoint.
  • • The whole lifecycle in one place — discovery through round modelling, cited diligence, IC memo and LP update, on a single data model.
  • • Agents whose operating instructions you can read and edit, so the system underwrites the way your fund does — not how a vendor's black box scores.
  • • Answers grounded in your own records with the tool calls shown, rather than an opaque score.

Where the specialists are stronger

  • • Proprietary coverage at formation and in stealth — Harmonic's 35M company / 195M people index is a data moat FastVC does not try to replicate.
  • • Frontrun's investor follow-graph is a genuinely earlier signal than anything derivable from public filings.
  • • Specter's cross-channel growth history is deeper on consumer and SaaS traction.
  • • Inven's multilingual website reading is stronger for mid-market and M&A search.

How they fit together

  • • The honest answer is that most funds run a stack. FastVC is designed to be the workflow and reasoning layer on top of whichever sourcing index you trust.
  • • Connect a specialist sourcing feed for earliest-signal coverage; keep Affinity or Attio as the relationship system of record.
  • • Use FastVC where those tools stop — the modelling, diligence, IC and LP work that still happens in spreadsheets and documents.
  • • Everything is reachable over API and MCP so the squad can read from all of it.
Free & open source

Use FastVC for free. Own the system that compounds your edge.

Self-host it, keep confidential deal data inside your security boundary, and modify every agent, ranking rule and workflow into an information advantage unique to your firm.

Start free→View source on GitHub→