In our work advising 600+ startups on fundraising, the most-active B2B SaaS check writers cluster around Bessemer Venture Partners, Insight Partners, Accel, Matrix Partners, and OpenView, with Sequoia, Andreessen Horowitz, and Battery Ventures dominating mega-rounds. AI-native B2B SaaS dominated 2025 — Glean closed Series F at $7.2B valuation, Cursor at $9.9B, and Notion runs annual secondaries at premium multiples.
B2B SaaS is the deepest VC category alongside AI — and increasingly the two overlap. With AI-native SaaS taking the lead in 2025, founders raising in 2026 face a higher bar: a sharp ICP wedge, defensible AI integration (not just GPT wrappers), and signed enterprise pilots. The good news: capital is genuinely back, and Series A through growth rounds are flowing for differentiated B2B SaaS plays.
We track active B2B SaaS VCs in our Waveup Copilot database — the cards on this page sync from there weekly, so you're always pitching active funds, not last year's roster. Below is the working shortlist with focus, stage, check size, and live investment activity.
Best 5 B2B SaaS VCs at a glance
- Bessemer Venture Partners — historic SaaS leader; publishes the 10 Laws of Cloud SaaS; Series A through growth across enterprise SaaS, fintech, and infrastructure.
- Insight Partners — largest dedicated B2B SaaS / scale-up investor globally; $80B+ AUM; Series A through pre-IPO at $5M–$50M+ checks.
- Accel — multi-stage with deep B2B SaaS portfolio (Slack, Atlassian, UiPath, Vercel); Series A leadership at $2M–$15M.
- Matrix Partners — Series A/B specialist; B2B infrastructure and SaaS focus; backed HubSpot, Zendesk, Cloudflare.
- OpenView — pure-play B2B SaaS specialist with strong PLG (product-led growth) thesis; expansion-stage focus.
Top venture capital firms investing in B2B SaaS
B2B SaaS funds split into three patterns: pre-seed and seed at $250K–$2M (Boldstart, Point Nine, Northzone), Series A leads at $2M–$15M (Accel, Matrix, Bessemer, OpenView), and growth at $15M–$100M+ (Insight Partners, Bessemer growth, Sequoia). The cards below sync with our database — focus areas, stage, and check sizes reflect each fund's current profile.
- AI & Deep Tech
- Advertising & Marketing
- +34
- Seed
- Series A
- +3
- $0-$100K
- $100K-$500K
- +3
- AI & Deep Tech
- Advertising & Marketing
- +34
- Seed
- Series A
- +3
- $500K-$1M
- $1M-$3M
- +2
- AI & Deep Tech
- Advertising & Marketing
- +33
- Seed
- Series A
- +3
- $500K-$1M
- $1M-$3M
- +2
- AI & Deep Tech
- Advertising & Marketing
- +31
- Series A
- Series B
- +2
- AI & Deep Tech
- Advertising & Marketing
- +32
- Seed
- Series A
- +4
- $500K-$1M
- $1M-$3M
- +1
- AI & Deep Tech
- Advertising & Marketing
- +19
- Pre-Seed
- Seed
- +3
- $500K-$1M
- $1M-$3M
- +1
- AI & Deep Tech
- Advertising & Marketing
- +33
- Seed
- Series A
- +3
- $10M-$50M
- AI & Deep Tech
- Advertising & Marketing
- +32
- Seed
- Series A
- +4
- $1M-$3M
- $3M-$10M
- +1
- AI & Deep Tech
- Advertising & Marketing
- +33
- Series A
- Series B
- +2
- $3M-$10M
- $10M-$50M
Methodology — how we keep this list current
We pulled this list from our Waveup Copilot fund database — VCs cross-checked against Crunchbase, TechCrunch, and the funds' own sites. To make the cut, a fund had to have an active B2B SaaS thesis, be writing checks in 2024–2025, and cover at least one of pre-seed, seed, Series A, or growth.
Because the cards sync with our database, the focus areas, stage ranges, and check sizes you see reflect each fund's current mandate — not what we wrote when this article first published.
B2B SaaS Series A specialists
Accel, Matrix Partners, Bessemer Venture Partners, Insight Partners, OpenView, Eight Roads Ventures, Point Nine, and 645 Ventures lead B2B SaaS Series A in 2026. Most write $2M–$15M Series A checks and require either $1M+ ARR, signed enterprise pilots, or a credible founder-market fit. The bar has risen since 2023 — pre-revenue B2B SaaS is harder to raise unless there's an AI-native wedge or named-buyer pilots.
Series A is where most B2B SaaS founders raise institutional capital. Recent named rounds: Glean closed Series F at a $7.2B valuation in 2025 (AI-native enterprise search). Cursor (AI code editor) closed Series C at $9.9B valuation. Qodo raised $70M Series B for AI agents in code review and testing. Aiera closed $25M Series B in June 2025 backed by Wall Street investment banks plus Microsoft as a strategic partner. The pattern: AI-native B2B SaaS with proprietary data or a sharp vertical wedge can still close fast at premium multiples.
Vertical SaaS VCs
Battery Ventures, Bessemer, Andreessen Horowitz, Bond, Insight Partners, and pure-play vertical-SaaS specialist Ardent Capital lead vertical-SaaS investing. Vertical SaaS — software for healthcare, legal, construction, agriculture, manufacturing — is now ~30% of total B2B SaaS deployment in 2025, and the fastest-growing sub-category as horizontal SaaS matures.
Vertical SaaS keeps winning capital. The thesis: deep domain expertise beats horizontal generalists in regulated, complex industries. Healthcare SaaS (Verily-tier), legal tech (Harvey, Spellbook), construction tech (Procore peers), agritech, and manufacturing SaaS plays all closed strong rounds in 2025. Founders with industry experience — not just generic SaaS playbooks — have a structural advantage. Series A rounds at $5M–$15M with $500K–$2M ARR remain achievable for vertical SaaS plays with credible buyer pilots.
PLG (product-led growth) SaaS VCs
OpenView (the original PLG VC), Bessemer, Iconiq, Sequoia, Battery Ventures, Madrona Venture Group, and Boldstart Ventures lead PLG B2B SaaS investing. PLG-native plays (Notion, Figma, Linear, Vercel) drove most of the SaaS valuation rerating since 2020 — and the model is now expected, not optional, for many enterprise SaaS categories.
Product-led growth has gone from edge case to expected pattern in B2B SaaS. OpenView pioneered the category and remains the deepest PLG specialist. Linear ($1.25B valuation 2024), Figma ($13.5B IPO July 2025), Vercel, and Notion — these are the PLG flagship cohort. For founders raising in 2026: PLG isn't a tactic, it's a baseline. Investors expect product-led acquisition + sales-assist motion as the default — pure outbound-led B2B SaaS is harder to raise.
Why is B2B SaaS still the deepest VC category in 2026?
Three forces keep B2B SaaS on top: (1) the AI replacement cycle — Fortune 500 companies are rebuilding workflows around AI agents, creating a wave of new SaaS demand; (2) public-market validation — Figma's $13.5B IPO and Stripe's $159B valuation prove SaaS exit liquidity; (3) the maturation of vertical SaaS into the largest single sub-category. Mega-round activity remains heaviest in B2B SaaS adjacent to AI.
B2B SaaS is structurally different from consumer or hardware. Recurring revenue, predictable unit economics, and high gross margins make it underwriting-friendly. AI is now the largest tailwind: enterprise AI deployment opens entirely new SaaS categories (agentic SaaS, AI copilots for vertical workflows, AI-native analytics) that traditional SaaS incumbents haven't built yet. The companies winning in 2026 layer AI deeply into core workflows, not as a bolt-on feature.
Public-market validation matters too. Figma's $13.5B IPO in July 2025 was the largest SaaS IPO of the year. Stripe's $159B valuation in February 2026 — though a private tender — set a benchmark for what scaled B2B infrastructure plays can be worth. Chime's $9.8B IPO debut showed fintech-SaaS crossover liquidity is open. Together these signal that the SaaS exit lane is functional again, which gives growth-stage investors confidence to deploy capital.
Related read:
- Top VCs investing in AI
- Top fintech VC firms
- Top cybersecurity VC firms
- Top deep tech VC firms
- Top venture capital firms in NYC
- Top VC firms in San Francisco Bay Area
Are B2B SaaS VCs the right fit for your raise?
Yes — pitch B2B SaaS VCs first
- You have $500K+ ARR or 3+ paying enterprise pilots
- AI-native, vertical SaaS, or PLG motion — these dominate 2026 deal flow
- Net retention >100% — investors weight this heavily for B2B SaaS
- You have a clear ICP wedge — generalist horizontal SaaS is harder
- You're targeting Series A or beyond — late-stage SaaS capital is back
Not the best fit yet
- Pre-product, pre-team — most B2B SaaS VCs want at least an MVP and early signal
- Generic horizontal SaaS without AI or vertical wedge — crowded space
- Consumer-led product targeting B2B as afterthought — wrong sales motion
- Pre-revenue with no signed pilots — bar has risen since 2023
- No proven sales motion (PLG or named-account inbound) — investors will ask
How should you pitch B2B SaaS VCs in 2026?
We've seen B2B SaaS founders close 70% faster when they lead with $500K+ ARR, named-buyer pilots, and a sharp AI or vertical wedge — generic horizontal SaaS pitches no longer get traction. Build a 12–14-slide pitch deck, benchmark numbers against actual 2025–2026 SaaS deal data (Glean/Cursor/Notion-tier), and route the first intro through a portfolio founder, accelerator, or operator-angel.
B2B SaaS is the deepest VC category in 2026 — but also one of the most competitive. To stand out you need three things: (1) credible AI-native or vertical-SaaS wedge that differentiates from incumbents, (2) signed enterprise pilots or $500K+ ARR, (3) a clear sales-motion thesis (PLG, sales-assist, or named-account outbound) that matches your ICP. Charting your B2B SaaS course? Be investor-ready: target deliberately and pitch only funds whose check size and stage match your raise.
If you're not sure how to position your numbers — or whether your deck reads as Series A-ready against Glean/Notion-tier benchmarks — our team has helped 600+ startups raise across B2B SaaS, AI, fintech, and cybersecurity. We'll tell you straight whether you're ready or what to fix first.