Advertise to teams choosing an LLM observability or eval stack
AI engineers and tech leads use this index to compare tracing, evaluation, guardrail and prompt tools. Sponsorship buys visibility, never rank: the tables are sorted only by package downloads and stars.
Traffic: new site. Cloudflare Web Analytics figures will be published here once 30 days of data exist.
Monthly plans (USD)
Enhanced profile
$99/month
Annual: $990/year (2 months free)
- Logo on your tool page
- 300-word description
- Demo or call-to-action button
- Up to 3 case-study links
Unlimited slots
Subscribe: $99/monthFeatured
$149/month
Annual: $1490/year (2 months free)
- Everything in Enhanced profile
- Pinned “Sponsored” card above the tables on the home page
- Pinned card on your own alternatives page
- 3 slots in total
3 of 3 slots available
Subscribe: $149/monthCategory sponsor
$197/month
Annual: $1970/year (2 months free)
- Everything in Featured
- Banner on one category page
- Banner in that category’s section of the monthly report
- 1 slot per category (5 in total)
5 of 5 slots available (open: Tracing & observability, Evaluation, Guardrails & safety, Prompt management, Gateways with observability)
Subscribe: $197/monthLaunch offer: the first 3 sponsors (any plan) keep their price for 12 months. Checkout is a Stripe payment link; cancel any time from the Stripe customer portal. At checkout you give your product URL and tagline; your placement goes live with the next build.
Questions: sponsors@plainworktools.com
Integrity rules
- Payment never changes ranks, the download or star numbers, the facts shown, or which tools are listed.
- Sponsored cards and banners carry a “Sponsored” label and sit outside the ranked tables.
- No plan is called “verified”. Fact checks are free and apply to every tool the same way.
- Every eligible tool is listed for free. There is no listing fee.
How the numbers are measured: methodology.