# Cal Henderson at Slack Fund

> Cal Henderson, Co-Founder and CTO at Slack Fund. 1 investment on record. The rounds they were named in and the filings that name them, each with its source.

Source: https://millionrounds.com/person/cal-henderson (Millionrounds; every figure on the page links to its filing or article)

San Francisco, US · Angel

# Cal Henderson

Co-Founder and CTO at [Slack Fund](https://millionrounds.com/fund/slack-fund)

Latest rounds

- **Viktor** Series A · $75M May 2026
- **Linear** Series B · $35M Sept 2023

Backs *AI* *Collaboration Tools* *DevOps* *SAAS*

Profile summary

- **Rounds named:** 1 last May 2026
- **Filings:** - with regulators

What this record rests on

- ✓ **Named in rounds** 1 round name them
- **On filings** No filing names them
- ✓ **Linked to a firm** At Slack Fund
- **Claimed** Not claimed yet

Titles come from the investor lists this database was built from, so read them as of their date.

[Correct or remove](https://millionrounds.com/corrections?person=cal-henderson)[Is this you? Claim it](https://millionrounds.com/claim?person=cal-henderson)

## The firm

[**Slack Fund** VC firm **0** cheques in 12 months **0** all time **0** led unknown](https://millionrounds.com/fund/slack-fund)

## Rounds they were named in

- **Rounds:** 2
- **Led:** 0
- **Disclosed:** $110M
- **Active:** 2023–26

2026

- [Viktor](https://millionrounds.com/company/viktor) *Series A* **$75M** *PL* May 2026 Joined · +10 investors

2023

- [Linear](https://millionrounds.com/company/linear) *Series B* **$35M** *US* Sept 2023 Joined · +16 investors

By stage

- Series A **1**
- Series B **1**

What they backed

AI **2** Collaboration Tools **2** DevOps **1** SAAS **1** IT Services **1** Robotics **1**

Alongside

- [Accel *2*](https://millionrounds.com/fund/accel)
- [Guillermo Rauch *2*](https://millionrounds.com/fund/guillermo-rauch)
- [Stewart Butterfield *2*](https://millionrounds.com/fund/stewart-butterfield)
- [01Advisors *1*](https://millionrounds.com/fund/01-advisors)
- [Andrew Mason *1*](https://millionrounds.com/fund/andrew-mason)
- [Bek Ventures *1*](https://millionrounds.com/fund/bek-ventures)
- [Christina Cacioppo *1*](https://millionrounds.com/fund/christina-cacioppo)
- [Claire Hughes Johnson *1*](https://millionrounds.com/fund/claire-hughes-johnson)

Rounds where a report named this person rather than a firm, matched on name: read it as a strong hint, not proof, since people share names.

## Also at Slack Fund

- [**Sarah Friar** Chief Financial Officer *1 round*](https://millionrounds.com/person/sarah-friar-4)
- [**Edith Cooper** Co-Founder *0 rounds*](https://millionrounds.com/person/edith-cooper)

## Find people like Cal

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