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— INDEX · INSIGHTS

Research on hiring engineers.

Sourced, comparative, and written for hiring managers and founders making real trade-offs.

GUIDE · AI-PIPELINE · 11 min read

AI Recruiting: How It Works, What It Costs, and When It Fits (2026)

Inside ON3's pipeline: keyword filtering, vector embeddings, fine-tuned LLM vetting, live AI candidate conversations, and the senior engineer interview that follows.

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COMPARE · TOPTAL · 10 min read

Toptal Alternative for Permanent Hiring in Europe (2026)

Toptal is for freelancers. If you're hiring permanent engineers in the UK or Spain, here's how ON3's model compares on cost, vetting, and speed.

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GUIDE · FEES-UK · 12 min read

Recruitment Agency Fees UK: What You'll Pay in 2026

Contingency, retained and RPO fee models broken down with real UK examples, the costs hidden behind the headline percentage, and how AI-native fees compare.

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COMPARE · 001 · 12 min read

Recruitment Agency vs In-House Hiring for Engineers (2026)

Real UK costs, speed, and bad-hire risk. When to staff a search internally, when to bring in a specialist recruiter, and where engineer-led vetting fits.

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COMPARE · 002 · 14 min read

AI Recruiter Cost vs Agency Fees (2026)

Sourcing breadth, time-to-shortlist, pricing, and quality signal — how AI-native recruiting compares to a traditional agency, with the limits stated honestly.

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LOCATION · UK · 10 min read

Technical Recruiters in the UK (2026)

Engineer-vetted technical recruitment across the UK: salary benchmarks from 1.7M+ profiles, 24–48h shortlists, hires under 30 days, 7% or 20% fees.

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LOCATION · LONDON · 10 min read

Tech Recruitment Agency in London (2026)

The hardest, fastest engineering market in Europe — London salary bands, deciding factors, and how an engineer-led shortlist lands in 24 to 48 hours.

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