August was a busy month for companies building AI agents and the software around them. The largest disclosed rounds included Instinct’s $250 million Series B, HappyRobot’s $150 million Series C, and CodeRabbit’s $143 million Series C. Funding also went to companies working on agent security, deployment, coding, business operations, monitoring, and infrastructure. The table below ranks the largest disclosed rounds announced during August 2026 and includes the investors, valuations, locations, and other details where they were made public.
AI Agent Funding Rounds in August 2026
The largest disclosed funding rounds announced by AI agent companies, agent infrastructure startups, security platforms and companies building software around autonomous AI systems during August 2026.
| # | Company | Amount | Round | Date | Lead Investors | Category | Location | Details |
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| 1 | Instinct | $250M | Series B | Aug 26 | Index Ventures, Benchmark | Personal AI Agent | San Francisco, US | |
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Valuation
$2.5B
Total Funding
$350M
Product
Personal AI agent for handling tasks across messages, apps and services.
The $250M Series B brought Instinct’s total funding to $350M and valued the company at $2.5B.
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| 2 | HappyRobot | $150M | Series C | Aug 4 | Prysm Capital, Eurazeo | Enterprise Agents | San Francisco, US | |
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Valuation
$1.2B post-money
Total Funding
Approximately $200M
Other Investors
Andreessen Horowitz, Base10, Y Combinator and existing investors.
HappyRobot builds enterprise agents used across logistics, supply chain, insurance, energy, telecommunications and airlines.
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| 3 | CodeRabbit | $143M | Series C | Aug 12 | Atomico, Smash Capital | Coding Agents | US | |
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Valuation
$1.5B
Other Investors
BMW i Ventures, Datadog, CRV, Scale Venture Partners and others.
Product
AI code review and agentic change management software.
CodeRabbit announced its $143M Series C alongside Agentic Change Management, a product for managing code changes made by people and coding agents.
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| 4 | Acrab | $130M | Series B | Aug 6 | Vertex Ventures SEA & India, Vertex Growth | Agent Infrastructure | Singapore | |
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Focus
Compute infrastructure for agentic AI.
Technology
Purpose-built silicon, edge AI and orchestration.
Investors
Vertex Ventures SEA & India and Vertex Growth.
The company is developing infrastructure aimed at running AI workloads closer to where they are used.
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| 5 | Zenity | $125M | Series C | Aug 3 | Norwest | Agent Security | Israel | |
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Lead Investor
Norwest
Other Investors
SoftBank Vision Fund 2, Hitachi Ventures, LG Technology Ventures and others.
Focus
Security and governance for autonomous AI agents.
Zenity’s funding will support its work around security and governance as companies deploy more autonomous agents.
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| 6 | Obsidian Security | $85M | Series D | Aug 4 | Crescent Cove Advisors | Agent Security | Palo Alto, US | |
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Valuation
$1.1B
Other Investors
Greylock Partners, Menlo Ventures and existing investors.
Focus
Security for AI agents and non-human identities.
The Series D brought Obsidian Security’s valuation to approximately $1.1B.
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| 7 | Skan AI | $63M | Series C | Aug 12 | Cathay Innovation, Dell Technologies Capital | Enterprise Agents | Menlo Park, US | |
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Other Investors
Citi Ventures, Bloomberg Beta, State Farm Ventures and Wipro Ventures.
Products
Skan AI Blueprint, Skan AI Agents and Skan AI Intelligence.
Focus
Business process intelligence and enterprise software.
Skan AI announced the Series C alongside its work on software that maps business processes and helps companies automate them.
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| 8 | Sapiom | $35M | Series A | Aug 5 | Dragonfly | Agent Infrastructure | San Francisco, US | |
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Total Funding
$50M
Other Investors
Accel, Gradient, Coinbase Ventures, Operator Collective and others.
Reported Scale
270M+ transactions and 100,000+ agent runs per day.
Sapiom provides infrastructure for building, running and scaling AI agents.
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| 9 | Maximum | $30M | Seed | Aug 3 | CRV | Agent Infrastructure | Miami, US | |
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Other Investors
Pear VC, Restive, Plug and Play Ventures and Anthemis.
Market
Banking and financial services.
Focus
AI software and agents for banks.
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| 10 | Naïve | $28.5M | Series A | Aug 6 | Nexus Venture Partners | Agent Infrastructure | US | |
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Total Funding
Approximately $32M
Developer Customers
30,000+
Focus
Infrastructure for companies and operations run by AI agents.
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| 11 | Delightree | $25M | Funding | Aug 4 | Innovius, Accel | Operations Agents | San Francisco, US | |
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Other Investors
Timber Grove Ventures, Emergent.
Customers
More than 6,000 franchise and multi-unit locations.
Focus
Software for franchise and multi-unit business operations.
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| 12 | Runable | $21M | Series A | Aug 26 | Susquehanna Venture Capital, Nexus Venture Partners | Business Agents | Bengaluru, India | |
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Valuation
$65M post-money
Other Investors
Together Fund, Array VC.
Focus
AI agent for small business creation and growth.
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| 13 | June | $20M | Pre-seed | Aug 3 | TIME Ventures | Agent Deployment | US | |
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Backers
Michael Dell, Aaron Levie, George Kurtz, Diane Greene and others.
Focus
Enterprise AI deployment and implementation.
Status
Emerged from stealth with the funding announcement.
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| 14 | AGent | $11M | Seed | Aug 12 | Clean Industry Ventures, Intrepid Financial Partners, MassMutual Ventures, Spero Ventures | Agent Infrastructure | US | |
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Round
Seed
Investors
Clean Industry Ventures, Intrepid Financial Partners, MassMutual Ventures and Spero Ventures.
Focus
Software and infrastructure for agent-based workflows.
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| 15 | Alloy Robotics | $8M | Funding | Aug 13 | Square Peg | Robotics Agents | San Francisco, US | |
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Valuation
$80M
Other Investors
Blackbird, Airtree, Skip Capital and others.
Product
Agents that help engineers identify failures in robot fleets.
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| 16 | Hypercubic | $5.3M | Seed | Aug 18 | CIV, Afore Capital, Pioneer Fund | Coding Agents | US | |
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Other Investors
Afore Capital, Pioneer Fund, Y Combinator and others.
Focus
Modernizing legacy mainframe and COBOL software.
Product
Hopper, an agentic development environment for mainframes.
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| 17 | Fisent Technologies | $4.3M | Venture | Aug 11 | FINTOP Capital | Enterprise Automation | US | |
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Total Funding
$6.3M
Other Investor
Pega Ventures.
Focus
Process automation for regulated enterprises.
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| 18 | FriskAI | $3.6M | Pre-seed | Aug 11 | MaC Venture Capital | Agent Observability | Los Angeles, US | |
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Other Investors
Wischoff Ventures and individual investors.
Focus
Runtime intelligence and monitoring for AI agents.
Round
Pre-seed
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| 19 | Lemma | $2.3M | Pre-seed | Aug 13 | Matrix | Agent Monitoring | San Francisco, US | |
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Other Investors
Y Combinator, Liquid 2 Ventures, Cervin Ventures and others.
Product
Tools for finding and diagnosing failures in AI agent runs.
Scale
More than 1M agent traces per day.
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| 20 | Zerolook | $1.9M | Pre-seed | Aug 11 | Playfair | Travel Infrastructure | Zug, Switzerland | |
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Other Investors
Vento Ventures, TrueSight Ventures, Alpha Venture and others.
Funding
CHF 1.5M, approximately US$1.9M.
Focus
Reducing the cost and load created by AI-driven flight searches.
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FAQs
There were several significant funding rounds announced during August, led by Instinct’s $250 million Series B, HappyRobot’s $150 million Series C, and CodeRabbit’s $143 million Series C. The total depends on how AI agent companies are defined and which rounds are included.
Instinct raised the largest disclosed round, with a $250 million Series B announced on August 26. The round valued the company at approximately $2.5 billion, bringing its total funding to $350 million.
HappyRobot raised $150 million in a Series C on August 4, followed by CodeRabbit, which raised $143 million in its Series C on August 12.
There was no single investor that dominated the month. Major investors appearing across the larger rounds included Index Ventures, Benchmark, Prysm Capital, Eurazeo, Atomico, Smash Capital, Vertex Ventures, Norwest, Crescent Cove Advisors, Cathay Innovation, Dell Technologies Capital and Nexus Venture Partners.
The table ranks companies by the amount announced in the individual funding round during August 2026, from largest to smallest. Where a company disclosed a valuation, total funding or additional investors, those details are included in the expanded information.