Investors / United States / Haystack
Haystack
Venture capital · San Francisco, CA, United States · North America
Haystack is an early stage venture capital firm that has focused on the initial chapters of software and technology startup formation for over a decade. It typically invests $1M to $3M in initial rounds and can lead or participate.
Invests inHealthcare & BiotechAI & Machine Learning
In its own wordssoftwareaiearly stageenterprisedeveloper tools
Your fit with Haystack
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsHaystack lists 36 checked portfolio companies on its own site and is named in 24 funding rounds, 2 of them as lead. Its most frequent entry is Seed, 61% of the companies with a known first round. Its largest themes are Healthcare & Biotech (27%), AI & Machine Learning (25%) and Enterprise Software (10%). 93% of its companies are based in United States. It invests most often alongside Andreessen Horowitz, Y Combinator and General Catalyst.
Counts come from funding rounds that name Haystack, complete from mid-2025: earlier rounds appear only when they were reported later. Round amounts and full round histories are on Fundup AI.
Entry stage
share of companies by the stage of its first roundShow as a table
| Value | |
|---|---|
| Pre-seed | 0% |
| Seed | 61% |
| Series A | 35% |
| Series B | 0% |
| Growth | 4% |
Activity by year
rounds it joined, last 10 yearsShow as a table
| Total | Rounds it led | |
|---|---|---|
| '17 | 0 | 0 |
| '18 | 0 | 0 |
| '19 | 0 | 0 |
| '20 | 0 | 0 |
| '21 | 1 | 0 |
| '22 | 1 | 0 |
| '23 | 0 | 0 |
| '24 | 0 | 0 |
| '25 | 6 | 1 |
| '26 | 16 | 1 |
Investor profile
percentile among all firmsShow as a table
| Measure | Percentile of all firms | Value |
|---|---|---|
| Portfolio size | 73th | 35 companies |
| Recent activity | 98th | 18 rounds in 12 months |
| Early stage | 76th | 61% of entries at pre-seed or seed |
| Evidence | 73th | 9% of companies confirmed by a round |
| Sector focus | 42th | 27% in its largest sector |
| Reach | 59th | 3 countries |
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| Healthcare & Biotech | 27% | 15% |
| AI & Machine Learning | 25% | 18% |
| Enterprise Software | 10% | 8% |
| Fintech | 8% | 12% |
| Space & Defense | 6% | 3% |
| Cybersecurity | 4% | 4% |
| Real Estate & Construction | 4% | 3% |
| Education | 4% | 7% |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| Andreessen Horowitz | 7 |
| Y Combinator | 7 |
| General Catalyst | 5 |
| Sequoia Capital | 4 |
| A-Star Partners | 3 |
| Lightspeed Venture Partners | 3 |
| Night Capital | 3 |
| SV Angel | 3 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers36100%
- No longer answers00%
- Points to another company00%
- Parked or sold domain00%
A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.
Co-investor network
who it backs companies with, and who they back togetherAll co-investors or Compare portfolios with Andreessen Horowitz
Compare Haystack head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Recent portfolio activity
when companies last raised with Haystack| Date | Company | Stage |
|---|---|---|
| 20 Oct 2026 | Seed | |
| 8 Oct 2026 | Seed | |
| 24 Sept 2026 | Series A | |
| 17 Sept 2026 | Seed | |
| 18 Aug 2026 | Seed | |
| 29 Jul 2026 | Series A | |
| 1 Jul 2026 | Series A | |
| 11 Jun 2026 | Series A |
Round details for Haystack
Amounts, full round histories and every co-investor in Haystack's rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
36 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| alphaXiv connects papers, researchers, and organizations, grounding its answers in the underlying work. | EducationAI & Machine Learning | Nov 2025Seed | Funding round | |
| Avec is an email app that adapts to how you use it | Healthcare & BiotechFintech | Apr 2026Seed | Funding round | |
| Bench IQ provides an AI-powered service that allows attorneys to uncover the reasons behind their judges' rulings | Legal & ComplianceAI & Machine Learning | Aug 2025Seed | Funding round | |
| Birches Health provides online therapy for treating various addictions, including gambling and sex addiction. | Healthcare & Biotech | Sept 2025Seed | Funding round | |
| Blockit Ai provides an AI scheduling agent to handle calendar management | AI & Machine LearningSpace & Defense | Jan 2026Seed | Funding round | |
| The company sells a face-to-face game console and related accessories. | Enterprise SoftwareConsumer | Jun 2026Series A | Page + round | |
| Cambly provides online English tutoring services with native speakers. | EducationE-commerce & Marketplaces | Portfolio page | ||
| The company allows users to make and post games on their phone. | Enterprise SoftwareGaming | Portfolio page | ||
| The company provides a free app that offers real-time alerts, live video, and incident updates to help people stay safe and informed about their community. | Healthcare & BiotechCybersecurity | Portfolio page | ||
| Different creates, orchestrates and optimizes demand generation campaigns across channels for lean B2B teams using AI | AI & Machine LearningSpace & Defense | Oct 2026Seed | Funding round | |
| Portfolio page | ||||
| Enigma Labs provides a platform for people to report and discuss UFO sightings | AI & Machine LearningAI & Machine Learning | Portfolio page | ||
| Farcaster is a decentralized social network where users own their identity. | Media & EntertainmentConsumer | Portfolio page | ||
| Portfolio page | ||||
| Moxie provides software and services to help medspas and aesthetic practices launch, run, and grow their businesses. | Healthcare & BiotechEnterprise Software | Mar 2026Series C+ | Funding round | |
| Larridin helps enterprise organizations understand the impact of their AI investment | AI & Machine LearningEnterprise Software | Mar 2025Seed | Funding round | |
| Meadow Memorials provides cremation and funeral services, including preplanning and direct cremation | Healthcare & Biotech | Mar 2026Series A | Page + round | |
| Multiverse helps employers equip their workforce with AI skills to improve productivity | EducationAI & Machine Learning | Portfolio page | ||
| Neion Bio uses genetic engineering to produce medicines from chicken eggs | Healthcare & Biotech | Mar 2026Seed · 2 rounds | Funding round | |
| The company provides a personalized feed of puzzles and challenges through an app. | EducationEnterprise Software | Dec 2025Series A | Funding round |
About this data
site last read 5 Nov 2026- Site
- haystack.vc
- Last read
- 5 Nov 2026
- Watching since
- 5 Nov 2026
- Rounds since
- 26 May 2021
- Companies checked
- 36
Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.
Get Haystack's profile as data
Pull Haystack's portfolio, co-investors and changes through one API key or MCP, open every portfolio row, compare it with other firms, and get an email when it adds a company or files a fund.
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