Instantly vs Warmbly
Instantly
instantly.aiWarmbly
warmbly.comSide by side
| Figure | Instantly | Warmbly |
|---|---|---|
| Price from | $47/mo | $15/mo |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 17 | 6 |
| Spec score · Cold Email Software | 9.1 (#3) | 7.8 (#25) |
| Headquarters | Sheridan, Wyoming, United States | London, United Kingdom |
| Integrations | The marketplace lists integrations including Slack, HubSpot, Zapier, RB2B, BetterContact, Replit, Gojiberry, and Findymail. | The listed integrations include HubSpot, Salesforce, Pipedrive, Close, Zapier, Make, n8n, Slack, Discord, Calendly and Cal.com; Google Sheets lead sync is available on demand. |
| Product | Instantly describes itself as a sales platform combining cold email automation with a built-in B2B lead database. | Warmbly is an open-source cold outreach platform that combines email warmup, sending, inbox, campaigns, analytics and CRM. |
| Security | Instantly's privacy policy says its security measures may include firewalls, encryption, hashing or truncation, and access controls. | Warmbly says it uses TLS 1.2 or above in transit and AWS KMS-backed, per-organization AES-256-GCM encryption at the application layer. |
| Support | The Growth outreach plan includes chat support, while Scale lists premium live support. | The pricing page lists community support for Starter, email for Grow, priority support for Business and dedicated support for Enterprise. |
Plans
Instantly
- Free trialFree
- Growth$47 a month
- Growth (Credits)$47 a month
- Growth Credits$47 a month
- Growth (Outreach)$47 a month
- Starter$94 a month
- Hypergrowth$97 a month
- Hypergrowth (Outreach)$97 a month
- Supersonic (Credits)$97 a month
- Hyper Credits$197 a month
Warmbly
- Warmup pool · FreeFree
- Warmup pool · Unlimited$15 a month
- Starter$23 a month
- Grow$71 a month
- Business$263 a month
- EnterprisePriced on request
In their own words
Instantly
Instantly combines cold email automation with a built-in B2B lead database for sales outreach. Its outreach tools support automated sequences, unlimited sending accounts, warmup on paid plans, mailbox rotation, reply detection, and multichannel outreach. SuperSearch provides access to a database of 450M+ B2B leads, with filters and email enrichment. Instantly Copilot can find leads, generate campaigns and sequences, summarize analytics, and run recurring tasks. The integration marketplace includes HubSpot, Slack, Zapier, RB2B, BetterContact, and Replit. Growth (Outreach) costs $47 a month, billed monthly, and includes unlimited email accounts and warmup, 1,000 uploaded contacts, and 5,000 emails monthly. Its 14-day trial requires no credit card and allows up to two connected email accounts, 250 uploaded leads, and 1,000 campaign emails. Platforms listed include Android, iOS, web, and API. Instantly names agencies, freelancers, enterprise customers, founders, and sales and marketing teams among its use cases.
Warmbly
Warmbly is an open-source cold outreach platform that brings email warmup, campaign sending, a unified inbox, analytics, and CRM together. Campaign sequences can branch based on opens, clicks, or replies, include A/B variants, and send follow-ups in the same conversation thread. Sending can be restricted to weekday working hours in a selected timezone. The inbox classifies replies, bounces, out-of-office messages, and clicks across connected mailboxes. Warmbly is available on the web and through an API, or can be self-hosted under Apache 2.0. When a self-hosted installation connects to Warmbly Cloud for warmup, campaigns, contacts, and inbox data remain on the self-hosted server. Integrations include HubSpot, Salesforce, Pipedrive, Close, Zapier, Make, n8n, Slack, Discord, Calendly, and Cal.com; Google Sheets lead sync is available on demand. The free warmup pool supports up to 10 mailboxes. Paid campaign plans include Starter at $23 a month billed annually, with 150 emails per day, and Grow at $71 a month billed annually, with 3,000 emails per day.