INVESTOR NOTES / 001ANGEL INVESTOR / San Francisco, United States
KNOW THE INVESTOR. SHARPEN THE PITCH.

Angel investor · San Francisco, United States

Drew Houston.

Recorded investments.
A clearer sense of fit.

Find where your company fits, how rounds are assembled, and what happened after the first investment.

THE ENTRY PATTERN2015–2026
32%

of dated first investments
were at Angel, Pre-Seed or Seed

First investment stage across 19 companies6 Seed, 0 Angel and 13 other-stage entries. Each dot represents one company.
Seed 6Angel 0Other 13

One dot = one company at first recorded investment.

20 companies · 21 recorded equity rounds
Dataset’s latest round 22 May 2026/Latest recorded investment 28 Jul 2025
THE FOUNDER’S BRIEF

Read the pattern before the pitch.

Written insights from the recorded portfolio, with the evidence linked below.

01

Start with the first entry

Drew Houston has dated investments in 19 companies. 6 first entries were at Angel, Pre-Seed or Seed (31.6%). An early-stage founder can use the sector and stage filters to find comparable companies before approaching the investor.

Explore the evidence ↗
02

Separate activity from reputation

2 first company relationships appear in the latest 24 months, compared with 6 in the preceding window. The latest recorded investment is 2025-07-28. This describes observed activity through 2026-05-22; it does not establish current availability.

Explore the evidence ↗
03

Plan the next financing step

9 of 17 companies with a full 24-month observation window raised another equity round. This investor backed 1 of those companies again within that window. The difference is a reason to research the wider syndicate, rather than assume the same investor will fund the next round.

Explore the evidence ↗
04

Use a specific point of relevance

Artificial Intelligence is the largest displayed sector by company count, appearing in 6 portfolio companies; sector tags overlap. 0 first entries carry a recorded lead flag and the median first-round syndicate includes 6 other named backers. Shared rounds are evidence of co-investment, not evidence of an introduction route.

Explore the evidence ↗
01 / THE READOUT

Four signals before you pitch.

Start with observed behavior.
Every rate has a defined denominator.

01 — ROUND CONTEXT
$4.8M–$17M

The middle half of entry rounds

25th–75th percentile across 19 disclosed first rounds. Total round size; the investor’s own cheque is undisclosed.

Size your round ↗
02 — NEW RELATIONSHIPS
2companies

First investments in the last 24 months

22 May 2024–22 May 2026, versus 6 in the preceding 24 months.

See the rhythm ↗
03 — NEXT FINANCING
53%

Another equity round within 24 months

9 of 17 companies with a full observation window. The next round can include any investor.

Follow the path ↗
04 — REPEAT BACKING
6%

This investor invested again within 24 months

1 of the same 17 companies. Build a financing plan around the wider investor market.

Explore co-investors ↗
02 / FIND YOUR FIT

Where does your company sit?

Choose your sector and stage to find
companies he first backed in that space.

YOUR COMPANY

A match means a recorded investment in this category. It does not establish current interest or availability.

19matching companies
$15Mmedian first round (19 disclosed)
2first backed in last 24 months

All sectors · All entry stages. Round amounts are total financing, in USD.

Seed

Player Zero ↗

AI and cloud based solutions for product monitoring and management

$5.0M total first round
Seed

Cartwheel ↗

Provider of text-to-animation platform to animate characters for various projects

$5.6M total first round
Series A

Lamini ↗

AI-powered LLM platform for enterprise software development

$25M total first round
Explore matching portfolio companies ↓

The sector × stage map

First investments · companies can appear in more than one sector
Number of first investments by sector and entry stage. Select a cell to explore companies.
SectorSeedSeries ASeries BAll stages
Artificial Intelligence6
AI Infrastructure3
HealthTech3
Healthcare IT2
HRTech2
Product Management Tools1
3D Animation1
03 / ROUND DESIGN

The round around the investor.

Use stage-specific financing ranges
to frame the size of your syndicate.

First-round size, by entry stage

USD · middle 50% and median
Seed6 disclosed
$3.8M$2.6M–$4.9M
Series A8 disclosed
$15M$14M–$16M
Series B4 disclosed
$18M$16M–$24M
$10K$100K$1M$10M

Logarithmic scale. A dot marks the median; the band spans the 25th–75th percentiles. These are entire rounds, not individual cheques.

04 / WHAT HAPPENS NEXT

One investment. Two different paths.

A subsequent round and repeat backing
answer different fundraising questions.

17
companies with 24 months
of observable history

Raised another equity round

Any investor · within 24 months
52.9%
9 of 17 companies

Backed again by this investor

A subset of the companies above
5.9%
1 of 17 companies
i

Includes first investments on or before 22 May 2024. 2 newer companies and 1 undated histories are excluded. Follow-up stops at the dataset’s latest round on 22 May 2026. These observations do not measure returns or predict a company’s outcome.

See the stage-by-stage denominators +
First stageEligible companiesNext round ≤24 moSame investor again ≤24 mo
Seed42 / 40 / 4
Series A84 / 81 / 8
Series B43 / 40 / 4
Series C10 / 10 / 1
05 / INVESTMENT RHYTHM

New names. Returning relationships.

Separate first investments from later
rounds in companies already backed.

New companiesRepeat rounds

*2026 is partial, through 22 May. Bar height counts first investments + repeat rounds; earlier years are complete calendar periods in this dataset.

06 / THE CO-INVESTOR MAP

Who else belongs on your research list?

Frequent shared rounds suggest a place
to investigate sector and stage alignment.

02
ANGEL

Justin Kan ↗

3 shared rounds · 2 companies

Latest shared round Aug 2018
03
FIRM

Y Combinator

3 shared rounds · 2 companies

Latest shared round Aug 2018
04
FIRM

Accel

2 shared rounds · 2 companies

Latest shared round Jun 2024
05
ANGEL

Brook Porter ↗

2 shared rounds · 2 companies

Latest shared round Jun 2022
06
FIRM

Calibrate Ventures

2 shared rounds · 2 companies

Latest shared round Jun 2022

Shared rounds establish recorded co-investment. They do not establish a personal connection, introduction route, or current willingness to invest.

07 / THE EVIDENCE

Explore the portfolio.

First investment comes first.
Amounts refer to that entry round.

19 dated companies
Complete dated portfolio, ordered by first investment, newest first.
CompanyFirst backedEntry stageTotal entry roundSame investor again?
Jul 2025Seed$5.0MNo later round recorded
Cartwheel ↗New York City
Jun 2024Seed$5.6MNo later round recorded
Lamini ↗Palo Alto
May 2024Series A$25MNo later round recorded
Speak ↗San Francisco
Aug 2023Series B$16MNo later round recorded
Aug 2023Series B$16MNo later round recorded
Imbue ↗San Francisco
Oct 2022Series B$20MNo later round recorded
Regard ↗Los Angeles
Jun 2022Series A$15MNo later round recorded
Jun 2022Series A$15MNo later round recorded
Certa ↗Saratoga
Mar 2022Series A$15MNo later round recorded
Journey Colab ↗San Francisco
Sep 2021Series A$12MNo later round recorded
Superhuman ↗San Francisco
Aug 2021Series C$75MNo later round recorded
Twingate ↗Redwood City
Oct 2020Series A$17MNo later round recorded
Balsa ↗San Francisco
Oct 2020Seed$4.5MNo later round recorded
100 Thieves ↗Los Angeles
Jul 2019Series B$35MNo later round recorded
Simple Habit ↗San Francisco
May 2017Seed$2.5MNo later round recorded
Scale AI ↗San Francisco
May 2017Series A$4.5MYes · Aug 2018
Convoy ↗Seattle
Oct 2015Seed$2.5MNo later round recorded
Triplebyte ↗San Francisco
Sep 2015Seed$3.0MNo later round recorded
Color ↗Burlingame
Apr 2015Series A$15MNo later round recorded
1 more companies have undated investments

Kept in the 20-company portfolio; excluded from entry-timing calculations.

  • Kite · Angel · date unavailable
RESEARCH THE FIT. THEN MAKE THE CASE.

Your pitch starts with
your company.

Research your market ↗
RADAR / COMPANY DISCOVERY

Find the businesses
worth a closer look.

Search San Francisco, United States investor companies in Radar. Filter the company directory to explore the businesses behind your market and investor research.

Explore companies in Radar ↗
FLIAR / CUSTOM DASHBOARD SERVICE

A research dashboard.
Built for your company.

We build customized research dashboards for companies. Tell us which competitors, markets and questions matter to your team, and discuss a dashboard designed around your needs.

Discuss a custom dashboard ↗A customized service from Fliar. Contact us to discuss your requirements.
FLIAR PRISM / RESEARCH TOOL

Turn your questions
into deeper research.

Use Fliar Prism to research a company, market or topic, with reports and insights drawn from its research dataset.

Explore Fliar Prism ↗Start with the company or question you want to understand.
CONTINUE YOUR RESEARCH

Continue with Radar

Sign in to Radar to continue researching this investor.

Sign in to Radar ↗