What is the best company lookalike vendor or tool?

On an independent test against identical seed companies, Seltz is the most accurate overall (highest avg Precision@100 — the share of returned companies that are genuinely relevant across a 100-company list). PredictLeads has the most precise top-of-list results (Precision@10) and is the fastest. There is no single "best" on every axis — accuracy, coverage, and speed can favor different tools — so the benchmark reports each on identical inputs.

How do I find companies like my best customers?

Feed your best customers as seed companies to a lookalike / similar-companies tool and it returns others that resemble them. The independent benchmark measured which tools return the most relevant results on identical seeds: Seltz is most accurate over a long list, PredictLeads for the top few and fastest response. Clean your seed set first — a short list of your strongest, fastest-closing wins beats a large messy one.

What is the best tool for ICP expansion or account discovery?

ICP expansion and account discovery are lookalike problems: from accounts you already win, find more that look like them. The benchmark scores exactly that on identical seeds — Seltz leads on relevance across a long list, which is what a TAM/ICP build needs.

Is there an independent benchmark for company lookalike tools?

Yes — this one. Vendor accuracy claims aren't comparable because each tests on its own data. Openbenchmarks gives every provider the same seed companies and the same input, then a three-model LLM judge panel scores relevance. Every result is reproducible from the raw API request/response and the exact judge prompt, published as open data.

Why aren't Clay or Apollo in the ranking, and what about ZoomInfo?

ZoomInfo is in the ranking. It is reached through the self-serve GTM CLI at gtm.ai rather than an HTTP API, and it can be driven on the same seeds as every other provider, so it is scored by the same judge panel; it returns at most 25 results, so it is ranked on top-of-list precision only. Clay and Apollo still cannot be tested head-to-head: Clay runs lookalikes inside its workflow tables rather than an isolatable endpoint, and Apollo has no public company-lookalike endpoint.

benchmarks/lookalikes/best company lookalike tools

lookalike benchmark · tool ranking

Best company lookalike tools

Vendor accuracy claims aren't comparable as each tests on its own data. This is an independent test instead through benchmarking of company lookalike / similar-companies APIs — Ocean.io, Exa, Parallel, Seltz, PredictLeads, Extruct, CUFinder, Discolike, and ZoomInfo — ranked on how relevant the companies each one returns actually are, across 48 B2B seed companies.

[01] evidence

Benchmark evidence and per-seed audit trail

Same seed companies, same judge panel, Precision@10 and Precision@100 where each endpoint supports that depth — plus the per-seed matrix so you can inspect how each vendor behaved on each company.

long listPrecision@100: how relevant a vendor stays a hundred companies deep. The metric for lists that feed automated sequences. 3 vendors cannot appear here: their endpoint returns fewer than 100 results.

Long-list lookalike quality: aggregate Precision@100 by company lookalike API vendor
Rank	Vendor	Precision@100	Avg latency	Relevant / $1 at 100
1	Seltz	63.4%	4,835 ms	12,683
2	Extruct	61.1%	2,361 ms	624
3	Ocean.io	59.5%	2,444 ms	37
4	Parallel	56.9%	2,680 ms	11,383
5	Exa	48.6%	3,014 ms	501
6	Discolike	34.6%	1,164 ms	66

short listPrecision@10: how relevant the top of the list is. The metric that matters when a person works the results by hand and only the first few rows get touched. Every measured vendor appears here, and the only question asked of them is whether the companies are right.

Short-list lookalike quality: aggregate Precision@10 by company lookalike API vendor
Rank	Vendor	Precision@10
1	PredictLeads	89.8%
2	Seltz	84.4%
3	Exa	80.8%
4	Extruct	75.0%
5	Ocean.io	74.3%
6	Parallel	69.2%
7	ZoomInfo	67.1%
8	Discolike	41.9%
9	CUFinder	38.9%

benchmarks/lookalike/lookalike-2026-q348 examples · 9 vendors

audit viewcell = Precision@100; the small label shows P@10N/Avendor not yet run (or returned fewer than K results)click any scored cell to view the companies that vendor returned

#	Company type	Ocean.io	Exa	Parallel	Seltz	PredictLeads	Extruct	CUFinder	Discolike	ZoomInfo
01	Cloud observability and monitoring platforms that offer any of application performance monitoring, log management, security monitoring, or synthetic monitoringDevtoolsseed exampleDatadogdatadoghq.com
02	Restaurant point-of-sale platforms that offer any of payments, online ordering, payroll, or inventory managementHospitalityseed exampleToasttoasttab.com
03	Plumbing and drain services companies that offer any of plumbing, drain cleaning, water cleanup, or home servicesHome Services SaaS / Chainsseed exampleRoto-Rooterrotorooter.com
04	Construction management software that offer any of project management, financials, quality, safety, or contractorsB2B SaaSseed exampleProcoreprocore.com
05	On-demand consumer super-apps that offer any of ride-hailing, delivery, payments, financial services, or merchant servicesLogisticsseed exampleGrabgrab.com

Full routing by workflow, latency, cost, and methodology: the lookalike benchmark →