About Sunflower Capital
Sunflower Capital is a venture capital firm As of Oct 2024, Sunflower Capital has invested in 5 companies. It primarily invests in Seed round in United States based startups. Its investments are spread across a wide range of sectors from High Tech to Enterprise Applications and Blockchain Technology. Most recently it participated in the $***** Seed round of E2B Overall, Sunflower Capital portfolio has seen 1 acquisition, namely OpenMeter. A lot of funds co-invest with Sunflower Capital, with names like Felicis Ventures sharing a substantial percentage of its portfolio.Key Metrics
Sunflower Capital's List of All Investments
Sunflower Capital has a portfolio of 5 companies. Their most notable investmentis in TollBitTheir portfolio spans across United States and Czech Republic. They have invested in High Tech, Enterprise Applications, Blockchain Technology and 1 other sectors, across stages such as Seed, Series B and 1 more. Here is the list of all investments by Sunflower Capital:1. Letta
Developer of a memory-first agent accessible through desktop and CLI. The agent is designed for personalized experiences, evolving with user interactions. It utilizes background memory subagents to improve prompts, context, and skills over time. The agent's memory can be viewed, modified, and ported across different models.
Key facts about Letta
- Founded Year: 1997
- Location: San Francisco (United States)
- Stage: Early Stage
- Total Funding till date: $10M
- Investors: Felicis Ventures, Essence VC and 8 Others
- Latest Funding Round: Unattributed, Sep 23, 2024, $*****
- Highlight: Editors' Pick
2. OpenMeter
Open-source usage metering platform for AI, DevOps, and billing. It enables scalable usage-based billing, cloud cost management, and real-time data use cases for AI, DevOps, and IoT. It offers both an open-source version and a cloud-based version.
Key facts about OpenMeter
- Founded Year: 2023
- Location: San Francisco (United States)
- Stage: Acquired
- Total Funding till date: $3.5M
- Employee Count: 4 as on Jan 31, 2026
- Investors: Haystack, Y Combinator and 2 Others
- Latest Funding Round: Seed, Mar 18, 2024, $*****
- Highlight: Acquired
3. E2B
Developer of open-source runtime for executing AI-generated code in secure sandboxes. The runtime is designed for agentic and artificial intelligence use cases. It allows users to securely run code snippets and autonomous agents. The runtime supports various languages and frameworks, facilitating code execution, input/output operations, and internet access.
Key facts about E2B
- Founded Year: 2023
- Location: Prague (Czech Republic)
- Stage: Series A
- Total Funding till date: $35M
- Employee Count: 28 as on Mar 31, 2026
- Investors: Insight Partners, KAYA and 10 Others
- Latest Funding Round: Series A, Jul 27, 2025, $*****
- Highlight: Editors' Pick
4. TollBit
Provider of AI bot monetization solutions for publishers. This platform allows publishers to detect and manage AI bot traffic accessing their websites. It offers tools to enforce robots.txt policies, set custom pricing for bot access to content, and generate revenue from AI data scraping. The platform provides analytics dashboards to monitor bot activity and inform content strategy. Publishers can use this to protect their content and generate new revenue streams from AI usage.
Key facts about TollBit
- Founded Year: 2023
- Location: New York City (United States)
- Stage: Series A
- Total Funding till date: $31M
- Employee Count: 31 as on Jan 31, 2026
- Investors: Lerer Hippeau, Lightspeed Venture Partners and 6 Others
- Latest Funding Round: Series A, Sep 27, 2024, $*****
- Highlight: Editors' Pick
5. Hemi
Proof-of-Proof security delivers superior decentralization. It provides modular Layer-2 protocol for superior scaling, security, and interoperability, powered by Bitcoin and Ethereum.
Key facts about Hemi
- Founded Year: 2023
- Location: Delray Beach (United States)
- Stage: Series B
- Total Funding till date: $30M
- Employee Count: 36 as on Mar 31, 2026
- Investors: Breyer Capital, DNA and 28 Others
- Latest Funding Round: Series B, Sep 04, 2025, $*****
Sunflower Capital's Year-on-Year Investment Trends
Its most recent first time investment was in E2B.Sunflower Capital's Investments by Stage
Sunflower Capital has made 3 investments in Seed stage with an average round size of $7.17M, 1 investment in Series B stage with an average round size of $15M and 1 investment in Unattributed stage with an average round size of $10M.Stage of entry | No. of Investments |
|---|---|
Seed | 3 |
Series B | 1 |
Unattributed | 1 |
Note: We have considered here, only first round of investments
Sunflower Capital's Investments by Sector
Sunflower Capital has a diverse portfolio, with companies operating in the High Tech, Enterprise Applications, Blockchain - Industry Applications, Blockchain Technology and FinTech. Notably, it has invested in 5 Enterprise (B2B) companies, 5 Tech companies, 4 Saas companies and at least 4 companies focusing on Software.Sector | No. of Investments |
|---|---|
High Tech | 4 |
Enterprise Applications | 3 |
Blockchain - Industry Applications | 1 |
Blockchain Technology | 1 |
FinTech | 1 |
Note: We have considered here, only first round of investments
Sunflower Capital's Investments by Geography
Sunflower Capital has made most investments in United States (4), followed by Czech Republic where it has made 1 investment.Country | No. of Investments |
|---|---|
United States | 4 |
Czech Republic | 1 |
Note: We have considered here, only first round of investments
Sunflower Capital's recent investments
Sunflower Capital has not made any investment in 2026 so far.Here are the most recent investments by Sunflower Capital:
Filter this listDate | Company | Location | Round Details | Round Amount | Co-Investors |
|---|---|---|---|---|---|
Oct 18, 2024 | Czech Republic | Seed | 6976 | [+1] | |
Sep 23, 2024 | United States | Unattributed | 9451 | [+8] | |
Sep 18, 2024 | United States | Series B | 3262 | [+25] | |
Mar 18, 2024 | United States | Seed | 4791 | [+1] | |
Mar 05, 2024 | United States | Seed | 9046 | [+3] |
Acquired companies in Sunflower Capital's Portfolio
1 company from Sunflower Capital's portfolio has been acquired. The most recent acquisition was OpenMeter in Sep 2025 by Kong for $*****.Here are Sunflower Capital's portfolio companies that got acquired most recently:
Company | Acquisition Date | First Invested on | First Round of Investment | Round Size |
|---|---|---|---|---|
Sep 12, 2025 | Mar 18, 2024 | Seed | 6487 |
Co-investors of Sunflower Capital
Over the past 2 years, 56 investors have co-invested in Sunflower Capital's portfolio companies. This includes funds and angels.
- Invested before Sunflower Capital: Y Combinator, KAYA and 4 others have invested in rounds before Sunflower Capital. There is 1 company where Y Combinator has invested before Sunflower Capital and 1 company where KAYA has invested before Sunflower Capital.
- Top Co-investors of Sunflower Capital: 41 investors entered a company along with Sunflower Capital. These include investors like Felicis Ventures (1 company).
- Invested after Sunflower Capital: A total of 9 investors have invested in Sunflower Capital's portfolio after their investments. Top Investors include Insight Partners (1 company), Sunflower Capital (1 company) and Scott Johnston (1 company).
