Slack Fund — Pre-Seed & Seed VC Firm ($100K–$2.0M Checks)
Slack Fund is a Pre-Seed, Seed venture capital firm based in San Francisco, CA investing in Other, SaaS. The firm typically writes $100K–$2.0M checks and has 3 portfolio companies in our records.
- Check size
- $100K–$2.0M
- Portfolio
- 3 companies on record
- Partners
- 1 listed
- Stage
- Pre-Seed, Seed
- Sectors
- Other, SaaS
- HQ
- San Francisco, CA
- AUM
- Not in our records
Last verified: 2026-02-22
Pre-Seed, Seed
$100K – $2.0M
3+ companies
1 partner
Investment Thesis
Strategic fund backing apps that extend Slack and improve how teams work; strong fit if coaching lives inside Slack.
How Slack Fund invests
Slack Fund is a vc firm based in San Francisco, CA. The firm invests at the Pre-Seed, Seed stages, with a focus on Other, SaaS.
Slack Fund typically writes checks of $100K–$2.0M per investment.
Slack Fund has backed 3 companies in our records, including Donut, Figma, Airtable.
Partners & Team
Stuart Butterfield
General Partner
Industry Focus
Invests In
Portfolio Companies (3)
Other
Donut
Figma
Airtable
- •Raising at Pre-Seed, Seed? You're squarely in their sweet spot.
- •Lead with your fit in Other, SaaS — the sectors they actively back.
- •Size your ask to their typical $100K – $2.0M check.
- •Address your outreach to a specific partner, such as Stuart Butterfield, General Partner.
- •A warm introduction beats a cold email. Get matched and request an intro.
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