Instantly.ai
Cold email platform with unlimited sending accounts and AI-powered sequence optimization.
Paid·All audiences·Powered by OpenAI, Anthropic, and others·API available
Key strengths
Cold email outreach at scaleEmail deliverability and inbox placementAI Sales Agent and AI Reply AgentLead database with 450M+ B2B contactsUnlimited email accounts and warmupMulti-mailbox management for agenciesAI-powered campaign automation
Paid only · from $47 USD/mo
San Francisco, US
Founded 2022
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Recent changes
- Starting price: $37/mo → $47/mo
- Models updated: OpenAI, Anthropic, and others
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Developer & Integration Documentation
Instantly provides a public API that allows developers to build on top of its core platform features. Integration points include:
API & Automation:
- REST API available for managing campaigns, leads, and mailboxes programmatically
- Enables custom workflow automation, internal dashboards, and CRM sync pipelines
AI Model Integrations:
- Natively integrates with OpenAI (ChatGPT) and Anthropic (Claude) for AI-driven personalization, reply generation, and sales agent behavior
- Model provider ecosystem includes OpenAI, Anthropic, and others
Supported Integrations:
| Integration | Type |
|---|---|
| ChatGPT / OpenAI | AI model (personalization, replies) |
| Claude / Anthropic | AI model (personalization, replies) |
| CRM (export) | Data export to downstream CRM systems |
| Outreach providers | Campaign and sequence connectivity |
Authentication & Access:
- API access is included as part of the paid plan tiers; refer to Instantly's official API documentation for endpoint references and authentication details.
Pricing context for builders: Plans start at $47/mo (Growth). Higher-tier plans (up to $555/mo for Agency) unlock greater sending limits and multi-mailbox management relevant for multi-tenant integrations.
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