Investment firms for bootstrapped software companies

Yes. I found several firms that are unusually well matched to bootstrapped software companies seeking a minority investment. The best fit depends heavily on your ARR, growth rate, profitability, and whether you're B2B/vertical SaaS.

My shortlist

1. Mamba Growth Equity — probably my first call

Mamba explicitly says it makes minority investments in founder- and management-owned software companies, including bootstrapped or lightly capitalized businesses. Its stated targets are $2–15M+ ARR, 50%+ growth, cash-flow breakeven/profitability, 90%+ annual logo retention, with $5–15M investments.www.mambagrowth.com

Importantly, this isn't just marketing language: in June 2026, Mamba announced a minority investment in Clubspot, a founder-built B2B software/payments company.www.mambagrowth.com

Fit: ⭐⭐⭐⭐⭐

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2.Golden Section

Very interesting if you're vertical SaaS. Golden Section explicitly offers minority growth equity to B2B vertical software companies with $1–8M annual revenue, with roughly $5M initial checks.www.goldensection.com

They also emphasize cash-flow discipline rather than the typical "grow at all costs" VC model.

Fit: ⭐⭐⭐⭐⭐ if vertical SaaS

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3.Elsewhere Partners

Another unusually good match. They specifically seek bootstrapped or lightly capitalized software companies with $2–15M ARR and will do a minority growth transaction or majority recap. Their focus includes IT infrastructure, cybersecurity, business applications, and healthcare IT.elsewhere.partners

Fit: ⭐⭐⭐⭐⭐

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4.Insight Matters Capital

This one is particularly interesting if your goal is "I want to take some money off the table but absolutely do not want to give up control."

They explicitly advertise investing 10–25% in profitable, bootstrapped online businesses, with founders retaining majority ownership/control and typically no required board seat or forced exit timeline. Their stated range is roughly $1–20M in annual revenue, with $250K–$5M of liquidity.www.insightmatters.capital

Fit: ⭐⭐⭐⭐⭐ if you want a small minority sale rather than a traditional PE transaction.

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5.Sundance Growth

Focused on founder-led B2B software, particularly vertical, mission-critical systems of record. They explicitly consider bootstrapped/lightly capitalized businesses, target roughly $5–10M ARR, and can structure investments as minority or majority.www.sundancegrowth.com

Fit: ⭐⭐⭐⭐½

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6.Mainsail Partners

Mainsail is one of the best-known firms specifically built around bootstrapped B2B software founders. They have partnered with 100+ software companies and explicitly describe bootstrapping as a core part of their strategy.mainsailpartners.com

The catch is deal size: their current stated equity investments are considerably larger, so I'd consider them if you're already fairly substantial rather than an early-stage SaaS company.mainsailpartners.com

Fit: ⭐⭐⭐⭐ if you're larger.

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One important distinction

I'd avoid approaching ordinary VC funds for this. If you've bootstrapped a profitable software company, you have a very different financing profile from a venture-backed startup.

The investors above are looking for businesses where:

• revenue is already proven
• customer retention is strong
• the company is capital efficient
• the founder wants to remain involved
• new capital can accelerate growth without fundamentally changing the business

That is much closer to growth equity / minority PE than traditional venture capital.

I can narrow this to the best 5 for your company

Give me these 6 numbers/details:

1. Annual revenue or ARR
2. Year-over-year growth %
3. Profitability / EBITDA (or approximate)
4. B2B or B2C
5. What the software does / industry
6. How much you'd like to raise and approximately what % you'd be willing to sell

With that, I can research 10–15 specific firms, rank them by fit, identify their relevant partners, investment criteria, and recent comparable deals, and give you a targeted outreach list rather than a generic PE directory.