CircleCI vs incident.io: who uses which
Customers, public proof and the companies that use both.
On usedby, 84 companies use CircleCI and 49 use incident.io. 3 companies use both, including Contentful, Okta, and Honeycomb. CircleCI leads among the DevTools & Infrastructure companies on usedby that use either tool, incident.io among the Fintech & Payments companies.Latest check Nov 12, 2026: 133 of 133 public lines checked. Counts include every proof level, job-post signals included. A company on both tools counts at any proof level, and a job post on one side is marked as such.
Who uses CircleCI, incident.io, or both
Every company with a public proof for at least one of the two tools.
81
listed for CircleCI only
3
companies use both
46
listed for incident.io only
On usedby, 81 companies are listed for CircleCI only, 46 are listed for incident.io only and 3 use both, out of the 130 companies listed for at least one. An absent listing does not prove non-use.
Where it lands
Recently publicly listed customers
Who uses both
Companies with a public line on both tools, at any proof level: the strongest proofs come first, and a job post is marked.
| Company | First public proof, incident.io |
|---|---|
 Contentful | — |
 Okta | On or before Oct 2024 |
 Honeycomb | On or before Oct 2024 |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use CircleCI, incident.io or both: a share of the companies on usedby, not of the market.
Listed for CircleCI onlyBothListed for incident.io only
More common with CircleCI
- DevTools & Infrastructure10 of the 16 DevTools & Infrastructure companies on usedby that use either tool use CircleCI, 2 of them alongside incident.io.
More common with incident.io
- Fintech & Payments7 of the 9 Fintech & Payments companies on usedby that use either tool use incident.io.
- Marketplace4 of the 6 Marketplace companies on usedby that use either tool use incident.io.
- Sales Tech & CRM4 of the 6 Sales Tech & CRM companies on usedby that use either tool use incident.io.
Source: every usedby line, from confirmed proofs to job-post signals (the weakest proof level).
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
Vendor facts checked: CircleCI, 4 of 6; incident.io, 4 of 6. Missing facts remain unverified, not absent features.
CircleCIincident.ioWhat customers report
Results as the vendor or the customer published them, with the source and the date.
CircleCI
cut its AWS EC2 compute costs by 50%
Honeycomb
Vendor case study, circleci.com, published Nov 12, 2026
the time needed to run test suites has dropped from more than two hours to just 21 minutes on average
gtlogic
Vendor case study, circleci.com, published Nov 12, 2026
incident.io
Responder deployment reached 114% of contracted seats
Flagstone
Vendor case study, incident.io, published Mar 26, 2026
4+ hours saved on post-mortems
Built
Vendor case study, incident.io, published Mar 26, 2026
Evidence for your decision: incident.io
Source observations. Check the required plan and conditions before choosing.
Documented tasks
No reviewed task examples are available yet.
Choice criteria
Free trial or free plan: YesSourced observation
Plan: Unknown
Basic Free Forever Everything you need to get started with incident management
Integration: JiraSourced observation
Plan: Unknown
Export and automatically sync your incident actions with tickets in Jira.
Pricing: FreeSourced observation
Plan: Basic
Scope: Forever
Basic Free Forever Everything you need to get started with incident management
Integration: SlackSourced observation
Plan: Basic
Conditions: Basic plan only; native incident response scope.
Product: incident.io
Setup and limits: Named plan, contract entitlement, connector scopes, permissions, volume limits and regional eligibility remain unknown.; Documented only; not_tested. No authenticated vendor operation executed.
Slack or Microsoft Teams native incident response
Questions about CircleCI and incident.io
Which is used more, CircleCI or incident.io?
CircleCI has more customers on usedby: 84 against 49 for incident.io. CircleCI leads among the DevTools & Infrastructure companies on usedby that use either tool, incident.io among the Fintech & Payments companies.
Do companies use both CircleCI and incident.io?
Yes. 3 companies use both on usedby, including Contentful, Okta, and Honeycomb.
Who uses CircleCI?
84 companies on usedby, each with the public page that shows it. See who uses CircleCI.
Who uses incident.io?
49 companies on usedby, each with the public page that shows it. See who uses incident.io.
How does usedby count customers?
A company counts when a public page shows it: a vendor's customer page, a case study, a press release or a job post, most saved with a dated capture. Every line is a customer, at one of four proof levels: confirmed, declared by the company itself, observed or signal (a job post, the weakest). A company counts as using both tools when it has a line on each, at any level; the list shows the strongest proofs first and marks job posts.