Warmer.ai
Verified Oct 16, 2026 ActiveEnriches lead lists and writes personalized cold emails
Listed on EffectHub ·
Pricing
- Pricing model
- Paid
- Paid options from
- $59/mo
- Billing
- Monthly
Credit bundles per tier: 500 credits at $59, 2,500 at $119, 10,000 at $249, with annual billing priced at ten months.
Use tool ↗About Warmer.ai
Warmer takes a CSV of prospects, gathers public detail from their websites and social profiles, and writes a distinct opening line or full message for each row. Enriched records export as CSV or JSON, or push into Salesforce, HubSpot, Pipedrive, Outreach and Salesloft. Billing runs on credits, with one credit covering one enriched lead.
- Platforms
- Web · API
- API
- Yes
- Last verified
- Oct 16, 2026
Verified sources
- Growth $59/mo for 500 credits, Professional $119/mo for 2,500, Scale $249/mo for 10,000; annual at $590/$1,190/$2,490warmer.ai ↗
- RESTful API, CSV/JSON export and connectors for Salesforce, HubSpot, Pipedrive, Outreach and Salesloftwarmer.ai ↗
- Company based in London, United Kingdom, founded 2021pitchbook.com ↗
Is Warmer.ai legit?
We don’t label tools safe or unsafe. Below are the records we checked ourselves, each with the date we read it.
- Domain registered
- Jan 15, 2021 (5 years ago)Registry record (RDAP), registrar NameCheap, Inc., looked up Sep 6, 2026
- TLS certificate
- Issued by Google Trust Services, valid until Dec 16, 2026Seen in our own connection to the site on Oct 16, 2026
- Last checked
- Oct 16, 2026The site answered
- On the market since
- 2021The vendor's own material, read by us
- Operated by
- Warmer, United KingdomOur research, card verified Aug 16, 2026
Pros & cons of Warmer.ai
A narrow, well-scoped tool: feed it a list, get back a personalized line per lead. If you already own a sequencer and only need the personalization layer, it is far cheaper than rebuilding the stack around Clay.
Pros
- Unit cost falls steeply with volume, from about $0.12 to about $0.02 per lead
- REST API plus CSV and JSON export, so it slots into an existing pipeline
- Native connectors for the main CRMs and sequencers rather than Zapier-only
- Trading since 2021, so not a weekend project that vanishes next quarter
Cons
- $59 monthly floor applies even if you only need a few hundred leads
- Credits arrive bundled with a tier rather than as pay-as-you-go top-ups
- Output quality depends entirely on how much public data a prospect has
- The 3x reply-rate figures on the site are vendor marketing, not audited results
Best for
- Agencies personalizing large outbound lists on behalf of clients
- Sales teams already running Outreach or Salesloft who need better first lines
- Enriching a one-off CSV instead of subscribing to a full data platform
Not for
- Teams wanting sending, sequencing and inbox rotation in the same product
- Complex waterfall enrichment logic, which Clay handles far better
- Very small lists, where manual research beats a $59 monthly floor
Watch out: The $59 floor is monthly, so project-based or seasonal outbound pays for the months when no lists are being enriched.
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