Ad headline
Harness Named a Leader in DevSecOps Platforms 3 Years in a Row
Pattern: Hand-made illustration twist
Understory ranks No. 140 on Inc. 5000 list of fastest-growing companies in U.S. Read more about Understory on the 2026 Inc. 5000 list
Harness has 131 distinct ad creatives in our B2B ad libraries, 87 on LinkedIn, 32 on Meta and 12 on Google (10 search, 2 display). Its longest running ad has been shown on Google for 10 months. 7 of its ads scored 6 or higher out of 10 for B2B fit and craft.
Dev tools & infrastructure · harness.io
Each creative counted once, however many ads it runs as. Every platform publishes a different public sign an ad is working, so each row shows its own.
Every ad in our libraries is scored out of 10 by an AI model built to judge creative, up to 5 for how well it would land with a senior B2B buyer and up to 5 for craft. 7 of Harness's ads scored 6 or higher. We show the best in English, one per message and spread across channels, so no single campaign fills the list.
Ad headline
Harness Named a Leader in DevSecOps Platforms 3 Years in a Row
Pattern: Hand-made illustration twist

Pattern: Physical metaphor, photographed

Pattern: Physical metaphor, photographed
Pattern: Hand-made illustration twist
Ad headline
Your pipeline. Now with AI agents

Ad headline
26% of AI Spend Is Wasted. Is Yours?
Ad headline
87% had a security event this year
Ad headline
Close the execution gap in your advisory practice

Ad headline
Stop Checking Boxes. Start Closing Gaps.
87 distinct creatives, run as 169 separate ads, 56 of them sent from a named person. LinkedIn shares no performance data for US ads, so the best public sign an ad is working is how often Harness reruns it. These are the creatives it reruns most.
| Type | Harness | Dev tools & infrastructure advertisers |
|---|---|---|
| Message | 64% (56) | 13% |
| Single Image | 24% (21) | 70% |
| Document | 9% (8) | 3% |
| Article | 2% (2) | 1% |
| Type | Harness | Dev tools & infrastructure advertisers |
|---|---|---|
| No offer (brand) | 46% (40) | 75% |
| Webinar or event | 36% (31) | 10% |
| Report or guide | 13% (11) | 9% |
| Calculator or tool | 5% (4) | 1% |
| Demo | 1% (1) | 2% |
Ad headline
72% Got Blindsided by an AI Bill
Ad copy
72% of organizations got hit with an unexpected AI bill this year. Only 1 in 5 could explain why within hours.
Ad headline
87% had a security event this year
Ad copy
Confidence and control are not the same thing, especially when it comes to AI agents.
Ad copy
94% of engineering leaders say their AI ROI metrics are missing. Get the playbook for ship rate, cost-per-PR & more.
Ad copy
AI has collapsed the time-to-exploit window to under 24 hours. Is your team ready to respond at machine speed?
Ad copy
Only 36% of teams say AI has actually improved software quality.
Ad copy
Deployment and release are not the same thing. The best engineering teams treat them separately. Learn how today.
Ad headline
Harness Named a Leader in DevSecOps Platforms 3 Years in a Row
Ad headline
Close the execution gap in your advisory practice
Ad copy
You've done the training. You've had the conversations. So why does advisory disappear every tax season?
See the best B2B LinkedIn ads from every advertiser in the LinkedIn ad library.
32 distinct creatives, 7 of them shown for three months or more. Advertisers stop paying for ads that don’t work, so these are the ones Meta has shown longest.
| Type | Harness | Dev tools & infrastructure advertisers |
|---|---|---|
| Flexible (several images) | 53% (17) | 54% |
| Single image | 47% (15) | 30% |
| Type | Harness | Dev tools & infrastructure advertisers |
|---|---|---|
| No offer (brand) | 75% (24) | 83% |
| Webinar or event | 16% (5) | 3% |
| Report or guide | 9% (3) | 7% |







Ad headline
DevOps at the Speed of AI
Ad copy
DevOps Modernization Summit: DevOps at the Speed of AI.

Ad headline
Find Your Exposure Faster
Ad copy
When a zero-day drops, manual searching costs hours you don't have. Get the playbook that compresses your response from days to minutes.
See the best B2B Meta ads from every advertiser in the Meta ad library.
10 search ads and 2 display ads that ran for a month or more, 6 of them for three months or more. Below are the ones Google has shown longest, search and display apart.
| Type | Harness | Dev tools & infrastructure advertisers |
|---|---|---|
| Search text ad | 83% (10) | 88% |
| Display image ad | 17% (2) | 12% |
See the best B2B Google ads from every advertiser in the Google ad library.
In the public ad libraries we track, Harness runs ads on LinkedIn, Meta and Google, 131 distinct creatives in all, 87 on LinkedIn, 32 on Meta and 12 on Google (10 search, 2 display). Most of its creatives are on LinkedIn.
87 distinct creatives, run as 169 separate ads in LinkedIn’s Ad Library. Its most rerun creative runs as 14 ads.
32 distinct creatives in Meta’s Ad Library. Longest shown for 7 months.
12 on Google (10 search, 2 display), that ran for a month or more in Google’s Ads Transparency Center. Longest shown for 10 months.
Search Harness by name in each platform’s own public library, LinkedIn’s Ad Library, Meta’s Ad Library and Google’s Ads Transparency Center. Every ad on this page links to its entry there.
Every ad belongs to Harness. Understory is not affiliated with Harness. We collect public ads from each platform's own ad library to study what B2B advertisers run. Use them for ideas and make your own creative.
Or browse every B2B ad library.
We brief, design and run paid campaigns for B2B teams on LinkedIn, Google, Meta, Reddit and X, measured on pipeline in your CRM. Tell us what you sell and who you sell it to.