TS
The Slack Fund
San Francisco, California, United StatesFounded 2015
The Slack Fund invests in early-stage companies that are building the "Future of Work," with a focus on enterprise software, collaboration, productivity, and workplace technology startups. The firm takes a hands-on approach, partnering with founders from seed to early rounds to support innovation in a digital-first world.
Portfolio
13
Fund Size
$100M
Top Stage
Seed
Last 12 Mo
1
Team
JS
Jason Spinell
Director or Managing Director
Stage Distribution
Portfolio
13 investments
| Company | Round | Amount | Date |
|---|---|---|---|
| Swarmia | Series A | $10M | Jun 2025 |
| Videowise | Seed | $3M | Mar 2023 |
| Riot | Series A | $12M | Feb 2023 |
| Five to Nine | Seed | $4.3M | Jun 2022 |
| Pipe | Growth | $150M | Mar 2021 |
| Linktree | Series B | $45M | Mar 2021 |
| Hightouch | Seed | $2.1M | Dec 2020 |
| Index | Seed | $2.6M | Oct 2020 |
| Loom | Series B | $28.8M | May 2020 |
| Clockwise | Series A | — | — |
| Grain | Seed | $4M | — |
| Hightouch | Unknown | — | — |
| Commsor | Series B | $50M | — |
Top Co-Investors
Y Combinator3 shared
Founder Collective2 shared
Afore Capital2 shared
Coatue Management2 shared
Accel1 shared
Greylock Partners1 shared
Greenspring Associates1 shared
Shopify1 shared
Hubspot Ventures1 shared
Okta1 shared
MSD Partners1 shared
Seven Seven Six1 shared
Gradient Ventures1 shared
Cleveland Avenue1 shared
Sterling Road1 shared
Concrete Rose1 shared
aCrew1 shared
Peterson Ventures1 shared
NextWorld Capital1 shared
Kickstart Seed Fund1 shared
Last updated: 1 March 2026