Runloop

Infrastructure

medium confidence

runloop.ai ↗ · Status: active confirmed · Founded 2024

Runloop sells cloud VM-isolated devboxes and sandboxes for AI agents. Around them it now offers agent lifecycle tooling: the Agent API, Axons and Broker event streams, Agent Gateway and MCP Hub for credential isolation, Benchmark Job Orchestration with W&B Weave, Reflex background agents, and VPC deployment. It is execution and eval infrastructure for agent builders and training workloads, not an RL-data or environments vendor.

Key facts

Headquarters

San Francisco, CA, USAconfirmed cite

Headcount band

11-50reported cite

Total raised

$7Mconfirmed cite

Last round

Seed, $7M, 2025-07-30confirmed cite

SOC 2

claimedreported cite

What they sell

infraconfirmed cite

Open source

yes (SDKs/CLI only; core platform proprietary)confirmed cite

Deployment

managed-hosted / API (VPC deployment option claimed for enterprise)confirmed cite

What's new

12 sourced updates · last 6 months

21 Aug 2026customer Case study: Accrual built its ARC remote coding-agent platform on Runloop in 7 days
ARC (Accrual Remote Coder) runs on Runloop Sandboxes, Axons and Broker and went from concept to production in 7 days. About 80% of Accrual's coding now runs through ARC, as stated in the case study. It quotes Siddarth Chandrasekaran, Accrual's co-founder and CTO.
Why it matters: A named customer in a regulated vertical (accounting) using the full agent lifecycle stack. Accrual is also featured on the homepage.
16 Jul 2026partnership Kernel Managed Auth integration pattern for agent purchases
A tutorial with runnable examples. The agent runs in a Runloop devbox, Kernel Managed Auth holds the logins and credentials for the browser session, and spend limits (for example auto-approve up to $50, human approval for $50-$200) are enforced by orchestrator code outside the agent.
Why it matters: A reference pattern for keeping secrets away from agents that use browsers and payments. It is an integration tutorial, not an announced formal partnership.
11 Jun 2026customer Case study: ION migrated to Runloop in three days
ION builds self-improving websites run by agents and moved its full infrastructure to Runloop in three days, according to founder Samraaj Bath. The post claims Runloop supports 30,000+ concurrent environments and devbox starts under 100 ms.
Why it matters: A named production customer, though the case study is vendor-published and the capacity and latency figures are vendor claims.
27 May 2026customer Case study: Trajectory ran 10,000+ concurrent devboxes
Trajectory, a continual-learning platform that uses agents for model training and fine-tuning, burst to more than 10,000 concurrent devboxes. Lessons from the work led to HTTP/2 multiplexing in SDK 1.20.2, a wider Ubuntu base-image test matrix (Trajectory pinned 2018 and 2020 images), and package-mirror infrastructure for reliability under load.
Why it matters: A vendor-published scale signal for a training-style workload, with concrete lessons about the transport layer.
20 May 2026product Transparent Proxy for Runloop Tunnels
An X-Runloop-Host header lets customers serve devboxes behind their own branded domains without rewriting the Host header. It works only with authenticated tunnels and a valid bearer token.
Why it matters: Lets teams expose sandboxed agent services on their own domains without breaking host validation or cookies.
5 May 2026open-source Remote Agents SDK for Axons released (open source, MIT)
A TypeScript SDK (@runloop/remote-agents-sdk) that connects applications to Runloop-hosted remote agents (Claude Code, OpenCode and others) through Axons and Broker. It supports ACP (Agent Client Protocol) and Claude Code's native protocol. The repo runloopai/remote-agents-sdk is MIT-licensed.
Why it matters: An open SDK for running Claude Code or ACP-compatible agents remotely on Runloop infrastructure, with session replay and suspend/resume.
30 Apr 2026partnership Runloop joins Stripe Projects, demoed at the Stripe Sessions 2026 keynote
Runloop announced it is part of Stripe Projects and provides sandboxed execution for agents that build, test and launch commerce applications. Per the release, its sandbox was used in a demonstration at the Stripe Sessions 2026 keynote.
Why it matters: An ecosystem tie to Stripe (the CEO co-founded Index, which Stripe acquired) and a sign of Runloop's push into agentic commerce.
27 Apr 2026product Benchmark Job Orchestration launched with Weights & Biases Weave integration
Announced via PR Newswire: a service that schedules and runs thousands of agent benchmark scenarios across models in live codebases, terminals and browser workflows, sets baselines, catches regressions, and sends trace data (reasoning steps, tool use, execution paths) to W&B Weave. Runloop calls it an industry first, which is a vendor claim. CIO First covered it the same day, and Runloop's media page also lists a CIO First item dated 2026-07-27.
Why it matters: Relevant to eval and RL teams that need large-scale agent regression testing with traces in W&B.
27 Apr 2026product Axons: distributed event streams for agents
Axons are cloud agent sessions with multi-client streaming, durable history, SQLite-backed structured state, audit/replay and event-driven wakeups. They work with Devboxes, Secrets, Agent Gateway and MCP Gateway.
Why it matters: Gives long-running multi-agent workflows a coordination and audit layer, which helps data-ops traceability.
15 Apr 2026partnership Runloop becomes a sandbox provider for the OpenAI Agents SDK
Runloop devboxes can serve as the sandbox backend for OpenAI Agents SDK agents, with suspend/resume, snapshots, blueprints and Axon observability. OpenAI's openai-agents-python repo lists a 'runloop' optional extra (runloop_api_client) next to E2B, Modal, Daytona and Vercel. Runloop's docs carry an integration guide.
Why it matters: OpenAI's own SDK packages the integration, so it is confirmed. It is one of several sandbox providers and a developer integration, not evidence that OpenAI is a customer.
13 Apr 2026product Runloop Agent API released
A way to define, version and deploy agents onto Devboxes from Git, npm, PyPI or object storage. Agents are immutable and versioned with semver or a pinned commit. Stated use cases are benchmarking (keep the environment fixed while swapping agent versions), multi-agent workflows and production reliability.
Why it matters: Separates agent versioning from environment builds, which makes eval comparisons more reproducible.
2 Apr 2026product Tunnels add Wake on HTTP to spin up agents on demand
An HTTP request to a tunnel URL now wakes a suspended devbox (vendor says in under a second). The first request gets a 503 with retry instructions. Aimed at sporadic workloads such as GitHub webhooks and PR reviews.
Why it matters: Long-lived agent endpoints can stay suspended until they are called, which cuts idle compute costs.

Founding team

Jonathan Wall

Founder & CEO

Ex-Google: technical lead on the Google File System team and recipient of the Google Founders Award (both vendor-stated), and co-founder of Google Wallet (2011). Co-founder and CTO of Index (2015), which Stripe acquired. Founded Runloop in 2023 per the about page.

Profile ↗

What practitioners should know

For researchers

We found no benchmarks, datasets or papers authored by Runloop. It is execution and eval infrastructure: it hosts third-party benchmarks (Public Benchmarks, 2025-06, naming SWE-Bench Verified) and private Custom Benchmarks (with Fermatix.ai, 2025-10).
Benchmark Job Orchestration (2026-04-27) runs agent evals in parallel in codebase, terminal and browser environments and sends traces to W&B Weave. The Agent API (2026-04-13) lets you pin agent versions while keeping environments fixed.
The homepage lists 'RL Fine Tuning' as a use case. The Trajectory case study (2026-05-27) documents a continual-learning workload at 10,000+ concurrent devboxes, including transport-layer lessons (HTTP/2 multiplexing in SDK 1.20.2).

For program managers

The last known funding is still the $7M seed (2025-07-30). No newer round was found, but no full press or funding search was possible in this run, so treat this as unconfirmed.
Frontier-lab ties are integrations, not confirmed contracts. OpenAI's Agents SDK ships a 'runloop' sandbox extra alongside E2B, Modal, Daytona and Vercel, and the Remote Agents SDK supports Claude Code. The 2025 claim about unnamed 'model labs' is still unverified.
Named customer case studies, all vendor-published: Trajectory, ION, Accrual. Partnerships and integrations: Weights & Biases (eval traces), Stripe Projects (demoed at Stripe Sessions 2026), and Kernel (tutorial-level integration).

For data ops

Integrations: REST API, MIT-licensed Python and TypeScript SDKs, rl-cli, OpenAI Agents SDK provider, MCP Hub, ACP and Claude Code remote agents, W&B Weave.
Security: SOC 2 is claimed on the site and in the docs, and the homepage shows a HIPAA logo. A trust center exists at trust.oneleet.com/runloop, but its contents could not be read, so no report type or audit date was verified. Agent Gateway and MCP Hub keep credentials out of agents, and egress network policies exist.
Deployment: managed cloud, or VPC in AWS, GCP or Azure (vendor-stated). Axons provide durable session history for audit and replay.

Products

Devboxes / Sandboxes ↗

VM-isolated Linux sandboxes for running agents and agent tools. Homepage claims (vendor-stated): 10k+ parallel sandboxes, 10GB images starting in under 2 seconds.

Blueprints and Snapshots ↗

Reusable devbox environment templates, plus save/suspend/resume of devbox state.

Agent API ↗

Defines, versions and deploys agents onto Devboxes from Git, npm, PyPI or object storage.launched 13 Apr 2026

Axons and Broker ↗

Persistent event streams for agent sessions with durable history and structured state. Broker connects Axons to agents running in devboxes, including ACP agents and Claude Code.launched 27 Apr 2026

Benchmark Job Orchestration ↗

Runs agent benchmark scenarios in parallel across models, with baselines, regression detection and trace export to W&B Weave.launched 27 Apr 2026

Public Benchmarks ↗

On-demand runs of standard third-party coding-agent benchmarks (SWE-Bench Verified named). These benchmarks are not Runloop-authored.launched 18 Jun 2025

Custom Benchmarks (with Fermatix.ai) ↗

Private, organization-specific benchmarks for evaluating agents on proprietary code and business logic.launched 1 Oct 2025

Agent Gateway ↗

Proxies LLM API calls and injects credentials on the server side, so agents never see raw API keys.

MCP Hub ↗

A single endpoint to MCP tool servers, with per-server opaque tokens and tool-level access control. Real credentials stay on the server.

Tunnels (Wake on HTTP, Transparent Proxy) ↗

Exposes devbox services, wakes suspended devboxes on incoming HTTP requests, and supports customer-branded domains.

Reflex ↗

Runloop's platform for background coding agents, listed on the homepage. Its open-source SDKs are in reflex-os (MIT): API client, React chat UI kit and CLI. Launch date not found.

Deploy to VPC ↗

Deploys Runloop infrastructure into the customer's own AWS, GCP or Azure account (vendor-stated).launched 12 Nov 2025

SDKs, CLI and Remote Agents SDK (open source, MIT) ↗

Python and TypeScript SDKs, rl-cli, and remote-agents-sdk for Axon-backed ACP and Claude Code agents. All MIT-licensed.

Scale & velocity

Current headcount

~16-17 employees (Tracxn 16 as of 2026-01-31; PitchBook 17; press cited 12 in Jul 2025)reported cite

Headcount growth

unknown

Open roles

unknown

Other locations

unknown

Distributed / remote

Appears in-office (careers page features an employee testimonial about in-person office culture; no explicit remote policy or office location stated)estimated cite

Research depth

Has researchers

noestimated cite

Researcher count

unknown

Backgrounds

Founder/CEO Jonathan Wall: ex-Google (co-founded Google Wallet), co-founded Index (acquired by Stripe); deeper Google File System / Founders Award detail is vendor-stated, Senior engineers are alumni of Google, Stripe, Vercel, AWS, Meta, and Scale AI (per press)reported cite

Papers / benchmarks

No Runloop-authored papers/benchmarks found. Platform supports running third-party academic coding benchmarks: SWE-Bench, R2E-Gym, SWE-Smith, Multi-SWE (these are external benchmarks, not Runloop publications)reported cite

Capital

Total raised

$7Mconfirmed cite

Last round

Seed, $7M, 2025-07-30confirmed cite

Investors

The General Partnership (lead), Blank Ventures, Exponent Founders Capital, Nascent, Roneil Rumburg (angel)reported cite

Valuation

unknown

Revenue signals

Vendor-claimed: >200% customer growth and >100% revenue growth since March 2025; 'a few dozen customers'reported cite

Security & compliance

SOC 2

claimed-unverifiedreported cite

Other certifications

HIPAA (vendor-claimed; HIPAA logo shown on homepage), GDPR (vendor-claimed in 2025 press; not mentioned on current homepage)reported cite

Security page

https://trust.oneleet.com/runloopconfirmed cite

Product

What they sell

infraconfirmed cite

Open source

yes (SDKs/CLI only; core platform proprietary)confirmed cite

License

MIT (SDKs/CLI; core platform is proprietary/closed-source)confirmed cite

Deployment model

managed-hosted / API (VPC deployment option claimed for enterprise)confirmed cite

Maturity

GAconfirmed cite

Notable customers

Trajectory (vendor case study 2026-05-27; 10,000+ concurrent devboxes) self-claimed ION (vendor case study 2026-06-11; migrated in 3 days, founder quoted) self-claimed Accrual (vendor case study 2026-08-21 and homepage feature; ARC platform, co-founder/CTO quoted) self-claimed Detail.dev (CEO quote in 2025 vendor press release) self-claimed ⚑Unnamed 'major model laboratories' (2025 vendor claim; no lab named) self-claimed cite

Buyer analysis

Best fit: Teams building or training coding agents that need scalable, sandboxed execution environments to run agents, evals (SWE-Bench, etc.), and RFT/SFT loops.

How we verified this

2026-10-05 refresh: I opened every news source URL and confirmed titles, dates (all within 2026-04-02 to 2026-08-21, inside the window) and key figures: Trajectory 10,000+ concurrent devboxes and SDK 1.20.2 HTTP/2; ION 3-day migration, 30k+ environments and under-100 ms starts (vendor claims); Accrual ARC in 7 days with about 80% of coding, quoting co-founder and CTO Siddarth Chandrasekaran. The OpenAI Agents SDK integration is independently confirmed by OpenAI's repo, which lists a 'runloop' extra among several sandbox providers. The Stripe Projects release and its Stripe Sessions 2026 demo are confirmed on PR Newswire. The W&B benchmark orchestration launch is confirmed via Runloop's PR Newswire repost and CIO First. Jonathan Wall's headshot is a valid single-person PNG from runloop.ai/about. Corrections: removed an unsourced MCP Hub launch date; reversed the draft's claim that the HIPAA badge had disappeared (the homepage still shows a HIPAA logo); downgraded distributed_remote to an estimate; reframed the Kernel item as a tutorial; added missed products (Agent API, Reflex, Public and Custom Benchmarks, Deploy to VPC). The main gap is that web search was exhausted, so no independent funding, acquisition or press sweep could be run. A 2026 funding round cannot be ruled out. The trust center contents and the 2023 vs 2024 founding-year conflict also remain unverified.

Related vendors

Sources

runloop.ai/ · 2026-10-05, Homepage: products incl. Reflex, SOC 2 claim, HIPAA logo, VPC (AWS/GCP/Azure), trust center link, RL Fine Tuning use case, Accrual feature
runloop.ai/about · 2026-10-05, Jonathan Wall bio, timeline, headshot
cdn.prod.website-files.com/68f6566c0817e720021136f4/6967dde8ec6fc94795e9 · 2026-10-05, Headshot: HTTP 200 image/png, single-person portrait
runloop.ai/blog · 2026-10-05, Blog index with dated 2026 posts
runloop.ai/runloop-in-the-media · 2026-10-05, Media list with dates (W&B, Stripe Projects, Public/Custom Benchmarks, Deploy to VPC)
www.prnewswire.com/news-releases/runloop-joins-stripe-projects-providing · 2026-10-05, Stripe Projects release 2026-04-30, Stripe Sessions 2026 keynote demo
runloop.ai/media/runloop-joins-stripe-projects-providing-essential-infra · 2026-10-05, Runloop repost of Stripe Projects release
runloop.ai/media/runloop-launches-ai-benchmark-orchestration-platform-wi · 2026-10-05, Benchmark orchestration plus W&B, 2026-04-27 (PR Newswire)
ciofirst.com/runloop-unveils-benchmark-orchestration-platform-to-strengt · 2026-10-05, CIO First coverage dated 2026-04-27; W&B as strategic integration partner
runloop.ai/blog/tunnels-now-support-wake-on-http-this-means-that-y · 2026-10-05, Wake on HTTP 2026-04-02
runloop.ai/blog/agent-api-release · 2026-10-05, Agent API 2026-04-13
runloop.ai/blog/runloop-openai-agents-sdk-release · 2026-10-05, OpenAI Agents SDK provider 2026-04-15
raw.githubusercontent.com/openai/openai-agents-python/main/pyproject.tom · 2026-10-05, OpenAI's SDK lists a 'runloop' optional extra next to e2b, modal, daytona, vercel
docs.runloop.ai/docs/tutorials/openai-agentssdk-runloop · 2026-10-05, OpenAI Agents SDK integration guide
runloop.ai/blog/axon-release-part-1 · 2026-10-05, Axons launch 2026-04-27
runloop.ai/blog/axons-remote-agent-sdk-launch · 2026-10-05, Remote Agents SDK 2026-05-05
github.com/runloopai/remote-agents-sdk · 2026-10-05, MIT; ACP and Claude Code clients via Axon event bus
runloop.ai/blog/release-transparent-proxy-for-tunnels · 2026-10-05, Transparent Proxy 2026-05-20
runloop.ai/blog/runloop-trajectory-launch-partner-announcement · 2026-10-05, Trajectory 10k+ concurrent devboxes 2026-05-27
runloop.ai/blog/ion-case-study · 2026-10-05, ION case study 2026-06-11
runloop.ai/blog/trust-your-agent-with-a-credit-card-with-runloop-and-ker · 2026-10-05, Kernel Managed Auth tutorial 2026-07-16
runloop.ai/blog/accrual-moves-coding-agents-to-the-cloud-with-runloop · 2026-10-05, Accrual case study 2026-08-21
runloop.ai/media/runloop-launches-public-benchmarks-industry-standard-te · 2026-10-05, Public Benchmarks 2025-06-18 (SWE-Bench Verified)
runloop.ai/media/runloop-ai-and-fermatix-ai-partner-to-introduce-custom- · 2026-10-05, Custom Benchmarks with Fermatix.ai 2025-10-01
docs.runloop.ai/docs/overview/what-is-runloop · 2026-10-05, Docs overview: Devboxes, Axons, Blueprints, Snapshots, SOC2 compliant
docs.runloop.ai/docs/devboxes/overview · 2026-10-05, VM-based isolation
docs.runloop.ai/docs/axons/overview · 2026-10-05, Axons and Broker docs
docs.runloop.ai/docs/devboxes/agent-gateways · 2026-10-05, Agent Gateway docs
docs.runloop.ai/docs/devboxes/mcp-hub · 2026-10-05, MCP Hub docs (no launch date)
docs.runloop.ai/docs/overview/release-notes · 2026-10-05, Changelog; 2026-08-19 gateway/MCP auth header update
github.com/runloopai · 2026-10-05, MIT SDKs, rl-cli, remote-agents-sdk, reflex-os; updated through 2026-10-02
github.com/runloopai/reflex-os · 2026-10-05, Reflex SDKs (MIT), Runloop's background coding agents platform
trust.oneleet.com/runloop · 2026-10-05, Trust center exists; content not readable via fetch
runloop.ai/careers · 2026-10-05, No listed openings; employee testimonial on in-person office culture
www.prnewswire.com/news-releases/runloop-raises-7m-seed-round-to-bring-e · 2026-06-07, $7M seed, lead The General Partnership, Blank Ventures, HQ SF, 12 employees (Jul 2025), customers Detail.dev/ION/Accrual
www.prnewswire.com/news-releases/runloop-unveils-enterprise-grade-sandbo · 2026-06-07, Devboxes GA 2025-05-20; 'SOC2-compliant platform' claim
venturebeat.com/infrastructure/runloop-lands-7m-to-power-ai-coding-agent · 2026-06-07, 'a few dozen customers' incl. major model labs; >200% customer / >100% revenue growth since March; founder backgrounds
www.crunchbase.com/funding_round/runloop-ai-seed--bd4cd02b · 2026-06-07, Seed round dated 2025-07-30
www.crunchbase.com/organization/runloop-ai · 2026-06-07, Founded January 2024, San Francisco
tracxn.com/d/companies/runloopai · 2026-06-07, 16 employees as of 2026-01-31
pitchbook.com/profiles/company/629631-73 · 2026-06-07, 17 total employees

Last updated 2026-10-05 · Every quantitative field carries a source and a confidence tag. Fields we could not source publicly are marked unknown, never estimated. See the methodology.