Clay

Clay is the most interesting B2B sales tool I've seen in years. It's a spreadsheet-meets-data-enrichment platform that turns 'I need to research 500 prospects' from a multi-day task into an afternoon. Import a list of company URLs, ask Clay to enrich each row with founder name, recent funding, tech stack, LinkedIn job changes, and any other signal you care about — then layer AI to generate personalised outreach for each row. Watching it work for the first time genuinely feels like cheating. The core innovation is the integration layer. Clay connects to 75+ data sources (LinkedIn, BuiltWith, Crunchbase, Wappalyzer, Apollo, Hunter, RocketReach, Twitter, GitHub, dozens more) and lets you chain them. Spreadsheet-style. Add a 'company URL' column, then ask Clay to add 'CEO name' from LinkedIn, 'last funding' from Crunchbase, 'tech stack' from BuiltWith, 'GitHub activity' from GitHub. Each row enriches from multiple sources in parallel. The spreadsheet UI hides genuinely sophisticated workflows underneath. For founders doing outbound the workflow is: find a target list (or import from Apollo), enrich with the signals that matter for your offer, generate personalised opening lines via AI for each row (Clay supports GPT, Claude, and other LLMs natively), export to your sequencer (Apollo, Outreach, custom). The personalisation per email is real and meaningful — not 'Hi [FIRST_NAME]' but 'I noticed you just raised Series B and your CTO posted about hiring backend engineers — we help teams like yours scale Postgres without re-platforming.' The pricing model is credits-based. Free trial covers ~100 credits to evaluate. Starter at $149/month for 2K credits. Explorer at $349/month for 10K credits. Pro at $720/month for 50K credits. Credits scale per enrichment per row — a sophisticated workflow can burn through credits faster than expected. Compared to Apollo's per-user pricing, Clay rewards volume but punishes light use. Clay's growth is real. They went from ~$1M ARR to ~$50M ARR in about 2 years, mostly via word-of-mouth among growth and sales teams. The product has become required tooling for serious B2B outbound at growth-stage SaaS. My take: if you're doing B2B outbound and you need personalisation at scale, Clay is the new default. The free trial is enough to validate. Pay for Starter or Explorer based on volume. Pair with Apollo (cheaper data + sequencer) or Outreach.io (enterprise sequencer) — Clay's role is the enrichment + personalisation layer, not the sender. For indie founders sending under 100 cold emails per week, Apollo alone is probably enough. For scaled outbound, Clay is the unlock.