Harness vs PagerDuty: who uses which
Customers, public proof and the companies that use both.
On usedby, 45 companies use Harness and 11 use PagerDuty. 1 company uses both, including Twilio. Harness leads among the Banking & Mortgages companies on usedby that use either tool.Latest check Nov 13, 2026: 56 of 56 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 Harness, PagerDuty, or both
Every company with a public proof for at least one of the two tools.
44
listed for Harness only
1
company uses both
10
listed for PagerDuty only
On usedby, 44 companies are listed for Harness only, 10 are listed for PagerDuty only and 1 uses both, out of the 55 companies listed for at least one. An absent listing does not prove non-use.
Where it lands
Recently publicly listed customers
No new public customer listing since tracking started on October 9, 2026.
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, Harness |
|---|---|
 Twilio | On or before Aug 2026 |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use Harness, PagerDuty or both: a share of the companies on usedby, not of the market.
Listed for Harness onlyBothListed for PagerDuty only
More common with Harness
- Banking & Mortgages5 of the 5 Banking & Mortgages companies on usedby that use either tool use Harness.
- Fintech & Payments5 of the 5 Fintech & Payments companies on usedby that use either tool use Harness.
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: Harness, 4 of 6; PagerDuty, 0 of 6. Missing facts remain unverified, not absent features.
Harness
PagerDutyWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Harness
We went from a release cadence of every two weeks to multiple times a day.
Speedway Motors
Vendor case study, harness.io, published Aug 5, 2026
getting up and running six months ahead of plan
Twilio
Vendor case study, harness.io, published Aug 5, 2026
PagerDuty
reducing initial response and communications times to critical incidents by 30%
SAP
Vendor case study, pagerduty.com, published Sep 16, 2023
MTTR is now under 30 minutes
DraftKings
Vendor case study, pagerduty.com, published Jun 15, 2023
Questions about Harness and PagerDuty
Which is used more, Harness or PagerDuty?
Harness has more customers on usedby: 45 against 11 for PagerDuty.
Do companies use both Harness and PagerDuty?
Yes. 1 company uses both on usedby, including Twilio.
Who uses Harness?
45 companies on usedby, each with the public page that shows it. See who uses Harness.
Who uses PagerDuty?
11 companies on usedby, each with the public page that shows it. See who uses PagerDuty.
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.