Who uses Kernel?
On usedby, 14 companies use Kernel, including Felicity, Flint, and Rye. 5 of them are confirmed by a published case study, quote or press release. Every company links to the public page that names it.
14 companies, each with its public proof
Strongest proof first. Open a company to see the page that names it, and when we captured it.
ConfirmedFelicity
ConfirmedFlint
ConfirmedRye
ConfirmedStably
ConfirmedThe Prompting Company
ObservedY CombinatorInvestment & VC
ObservedVercelDevTools & Infrastructure
ObservedEmergentBiotech & Pharma
ObservedFramerDevTools & Infrastructure
ObservedCash AppFintech & Payments
ObservedClaim Health
ObservedCoframeMarketing Tech
ObservedNovoflow
ObservedWoflow
| Company | Industry | Proof | First public proof | Source |
|---|---|---|---|---|
| Felicity | — | — | kernel.sh | |
| Flint | — | — | kernel.sh | |
| Rye | — | — | kernel.sh | |
| Stably | — | — | kernel.sh | |
| The Prompting Company | — | — | kernel.sh | |
| Y Combinator | Investment & VC | — | kernel.sh | |
| Vercel | DevTools & Infrastructure | — | kernel.sh | |
| Emergent | Biotech & Pharma | — | kernel.sh | |
| Framer | DevTools & Infrastructure | — | kernel.sh | |
| Cash App | Fintech & Payments | — | kernel.sh | |
| Claim Health | — | — | kernel.sh | |
| Coframe | Marketing Tech | — | kernel.sh | |
| Novoflow | — | — | kernel.sh | |
| Woflow | — | — | kernel.sh |
What customers say Kernel changed
Figures and quotes as Kernel and its customers published them, each tied to its source. We quote, we do not measure the result.
“we evaluated many options, and kernel is the only one that could deliver the performance all of our customers' test suites required.”
Jinjing LiangCo-founder & CEO, Stably“when it comes to infra, i'll take reliability over great developer experience. kernel has both.”
sam sheridanfounding engineer, Flint“since day one, kernel has felt like they were part of our team. we trust them to reliably support the automations our healthcare customers build with us.”
saahil madgeco-founder & ceo, FelicityThe Prompting Company · Vendor case studyRead how The Prompting Company uses KernelIs Kernel used in companies like yours?
By industry
5 industries among 14 customers.
What Kernel does, and what to check
What Kernel does
Cloud browser infrastructure for AI agents. Spins up sandboxed Chromium sessions in under 30ms with stealth, managed auth, proxies, and live replays. SOC 2 and HIPAA.
Written by usedby from kernel.sh.
Questions to ask in your demo
- Which of your customers look like us, by industry and size?
- What does a pilot cost, and what decides the move to a full contract?
- Where is our data stored, who can access it, and is it used to train models?
- How does Kernel work with the tools we already use?
Kernel alternatives, by public customers
Same or competing category, from another vendor. Every proof level counts.
- KernelThis toolReference
BraintrustObservability and evaluation platform to trace, score and improve AI agents in production.1 shared with Kernel1 sharedKernel vs Braintrust →
LangSmithObservability platform to trace, monitor and debug AI agents and LLM apps0 shared with Kernel0 sharedWho uses LangSmith →
Arize AIUnified LLM observability and agent evaluation platform0 shared with Kernel0 sharedWho uses Arize AI →
LangChainFramework for building LLM applications0 shared with Kernel0 sharedWho uses LangChain →
TrueFoundryEnterprise AI gateway, MCP gateway and deployment platform to route, govern and run models and agents.0 shared with Kernel0 sharedWho uses TrueFoundry →
Questions about Kernel
Who uses Kernel?
14 companies use Kernel (5 confirmed, 9 observed), including Felicity, Flint, and Rye.
What are the alternatives to Kernel?
Ranked by public customers (every proof level counts, job posts included), the top Kernel alternatives are Braintrust (44 customers, 1 shared), LangSmith (43 customers, 0 shared), Arize AI (37 customers, 0 shared), and LangChain (35 customers, 0 shared). See all Kernel alternatives.
How does usedby know who uses Kernel?
Each company is linked to a public page that names it: Kernel's customer page, a published case study, a press release or a job post. We save most pages with a dated capture and check them again on each run. A company leaves the list only after three checks in a row that no longer find it, and at least 14 days after it was last seen. A company with a published case study or quote is never removed automatically.
What do confirmed, observed and signal mean?
Confirmed (5): a case study, a named quote or a press release. Observed (9): Kernel shows the company on its own pages, for example a logo wall. Signal (0): a job post shows the company’s employees use Kernel, the weakest proof. Every level counts as a customer, and each line shows its level.
How current is this list?
The most recent check was on October 25, 2026, and 14 of 14 companies on this list have been checked so far. A company leaves the list only after three checks in a row that no longer find it, and at least 14 days after it was last seen. A company with a published case study or quote is never removed automatically.
Where this data comes from
Two proof levels
Main sources
- Customer pageOct 25, 2026
- 5 case studies, quotes and press releasesOct 25, 2026
Cite this page
usedby (2026). Who uses Kernel? 14 companies. Retrieved from https://www.usedby.ai/tools/kernel, latest check October 25, 2026.