CompareSide-by-Side Comparison
First Sales
Cold email platform with automated warmup and inbox placement.
VS
Instantly.ai
The gold standard for cold email infrastructure and automation.
First Sales
Instantly.ai
API Type
REST
REST
MCP Ready
NO
YES
Free Tier
NO
NO
SDKs
None
None
Webhooks
YES
YES
Capabilities
Automated Deliverability Optimization, Inbox Placement Tracking, Email Warmup Management, Email Verification
Automate Cold Email, Inbox Warmup, Campaign Analytics, Cold Email Outreach
First Sales
Instantly.ai
API Type
REST
REST
MCP Ready
NO
YES
Free Tier
NO
NO
SDKs
None
None
Webhooks
YES
YES
Capabilities
Automated Deliverability Optimization, Inbox Placement Tracking, Email Warmup Management, Email Verification
Automate Cold Email, Inbox Warmup, Campaign Analytics, Cold Email Outreach
API & MCP Analysis
For AI-native operators choosing between First Sales and Instantly.ai, the decision comes down to API accessibility and how easily your agent can interface with each tool.
Instantly.ai has the edge here with an official MCP server, letting you connect it directly to Claude or Cursor. First Sales requires a REST API integration, which means your agent needs the API docs to build the connection.
First Sales Starter Prompt
"Claude, check my inbox placement status in First Sales for the new outreach campaign."
Instantly.ai Starter Prompt
"Claude, check my 'SaaS Founders' campaign in Instantly and pause it if the bounce rate is over 3%."
Support & Guidance
First Sales vs Instantly.ai FAQ
01
Which has a better API for AI agents — First Sales or Instantly.ai?
First Sales provides a REST API. Instantly.ai also offers an MCP server. Check the comparison table above for a full breakdown of SDKs, webhooks, and capabilities.
02
Can I connect First Sales or Instantly.ai to Claude or Cursor?
Instantly.ai has an official MCP server for direct connection. For First Sales, you can use the REST API docs with your AI agent.
03
First Sales vs Instantly.ai — which is better for sales automation?
It depends on your stack. First Sales is "Cold email platform with automated warmup and inbox placement." while Instantly.ai is "The gold standard for cold email infrastructure and automation.". Compare their API capabilities, MCP support, and pricing above to find the right fit for your workflow.