Agent Runtime & Sandbox — Timeline
20 milestones, source-traced.
Sep 1, 2024
Funding: Browserbase raised a $21 million Series A co-led by Kleiner Perkins and CRV, with…
Browserbase raised a $21 million Series A co-led by Kleiner Perkins and CRV, with participation from Okta Ventures.
funding-research →Jun 1, 2025
Product Launch: Browserbase launched Director, a no-code tool enabling non-technical users to build automations by describing…
Browserbase launched Director, a no-code tool enabling non-technical users to build automations by describing goals, coinciding with its Series B.
funding-research →Jun 18, 2025
Funding: Browserbase raised a $40 million Series B led by Notable Capital at a $300…
Browserbase raised a $40 million Series B led by Notable Capital at a $300 million post-money valuation, with participation from CRV, Kleiner Perkins, and angels Patrick Collison, Jeff Lawson, and Guillermo Rauch.
funding-research →Jul 1, 2025
Partnership: E2B's sandbox became available as an integration with Stripe Projects through Stripe's developer platform,…
E2B's sandbox became available as an integration with Stripe Projects through Stripe's developer platform, enabling secure AI agent workflows for enterprise customers.
funding-research →Jul 28, 2025
Funding: E2B raised a $21 million Series A led by Insight Partners with participation from…
E2B raised a $21 million Series A led by Insight Partners with participation from Decibel, Sunflower Capital, Kaya VC, and angel Scott Johnston, bringing total funding to $32 million.
funding-research →Jul 30, 2025
Funding: Runloop AI raised a $7.0M Seed round led by The General Partnership with participation…
Runloop AI raised a $7.0M Seed round led by The General Partnership with participation from Blank Ventures, Exponent Founders Capital, Nascent, and Roneil Rumburg.
funding-research →Sep 29, 2025
Funding: Modal raised an $87 million Series B led by Lux Capital at a $1.1…
Modal raised an $87 million Series B led by Lux Capital at a $1.1 billion post-money valuation, reaching unicorn status.
funding-research →Oct 1, 2025
Partnership: Browserbase launched Secure Agentic Autofill for Director in partnership with 1Password, enabling human-in-the-loop authorization…
Browserbase launched Secure Agentic Autofill for Director in partnership with 1Password, enabling human-in-the-loop authorization and just-in-time credential injection including TOTP.
funding-research →Feb 5, 2026
Funding: Daytona raised a $24M Series A led by FirstMark Capital (Matt Turck joining the…
Daytona raised a $24M Series A led by FirstMark Capital (Matt Turck joining the board) with participation from Pace Capital, Upfront Ventures, E2VC, Darkmode, Datadog, and Figma Ventures, at a $125M valuation.
funding-research →May 1, 2026
Modal raised ~$355M at a ~$4.65B valuation in May 2026 for its serverless AI/ML…
Modal raised ~$355M at a ~$4.65B valuation in May 2026 for its serverless AI/ML compute platform.
Knowledge base →May 21, 2026
Funding: Modal closed a $355 million Series C led by General Catalyst and Redpoint Ventures…
Modal closed a $355 million Series C led by General Catalyst and Redpoint Ventures at a $4.65 billion post-money valuation, with Menlo Ventures, Bain Capital Ventures, and Accel joining as new investors.
funding-research →Jun 1, 2026
Runloop provides managed runtimes and sandboxes purpose-built for coding agents.
Knowledge base →Jun 1, 2026
Agent runtime/sandbox emerged as a distinct, well-funded 2026 category providing the execution substrate beneath…
Agent runtime/sandbox emerged as a distinct, well-funded 2026 category providing the execution substrate beneath agent frameworks.
Knowledge base →Jun 1, 2026
Sandboxes isolate agent-run code from the host — a security necessity as agents execute…
Sandboxes isolate agent-run code from the host — a security necessity as agents execute untrusted, model-generated code.
Knowledge base →Jun 1, 2026
E2B and Modal anchor the code-execution side of agent runtimes; Browserbase anchors the browser-automation…
E2B and Modal anchor the code-execution side of agent runtimes; Browserbase anchors the browser-automation side.
Knowledge base →Jun 1, 2026
Demand for agent runtimes rose sharply with coding agents (Devin-style) that must run and…
Demand for agent runtimes rose sharply with coding agents (Devin-style) that must run and test their own generated code.
Knowledge base →Jun 1, 2026
The agent-sandbox layer is viewed as a likely 2026 acquisition target as hyperscalers move…
The agent-sandbox layer is viewed as a likely 2026 acquisition target as hyperscalers move to own the agent execution substrate.
Knowledge base →Jun 1, 2026
E2B operates open-source code-execution sandboxes for AI agents and surpassed 1B+ sandboxes created.
Knowledge base →Jun 1, 2026
Daytona provides secure, ephemeral development environments increasingly used as agent sandboxes.
Knowledge base →Jun 1, 2026
Browserbase offers headless-browser infrastructure that lets AI agents drive web browsers at scale.
Knowledge base →
Milestones merged from 0 curated events, 10 verified facts (with observed dates), and 10 business signals from the last 24 months. Deduped by date + label; curated entries take precedence.
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