Harp vs lemlist
lemlist is an all-in-one outbound platform: a 650M+ lead database, sequences across email, LinkedIn, calls, WhatsApp and SMS, AI agents and AI-generated replies, and an MCP server and CLI on every plan. Harp is narrower: the harness your own agent runs outbound through.
The short answer
If you want data, many channels and built-in AI in one self-serve platform, lemlist is built for that. If your own agent should run the loop, with LinkedIn kept in your own Chrome on your Mac and replies answered within minutes, Harp is built for that.
Side by side
| Topic | Harp | lemlist |
|---|---|---|
| What it is | The MCP harness for pipeline generation: research memory, sequences, sending, replies and LinkedIn, driven by your AI agent | An all-in-one outbound platform with data, sequences and AI agents |
| Lead data | Not sold; your agent uses the tools you already use | A 650M+ lead database |
| Channels | Email and LinkedIn | Email, LinkedIn, calls, WhatsApp and SMS |
| Agent access | MCP server built for long account lists | MCP server and CLI on all plans |
| Replies | The sequence stops; your agent answers email replies and books the meeting within minutes. LinkedIn replies wait for your yes in Slack | AI-generated replies and reply intent detection |
| Buying | Flat subscription after a short call; set up with you | Public plans from $69 a month; trial available |
Platform breadth vs a focused harness
lemlist covers a lot of ground in one product. Harp does less on purpose: it assumes your agent and your data tools are good at what they do, and gives the agent memory with evidence, sequences, sending, reply handling and LinkedIn at human pace.
When lemlist is the better choice
- You want lead data, sequences and AI from one vendor.
- You need calls, WhatsApp or SMS.
- You want to start today on a self-serve plan.
When Harp is the better choice
- Your agent is the operator.
- You want LinkedIn to run from your own browser and machine, with a right-person check.
- You want research saved with evidence and age.
Questions
See Harp on your own outbound
We set up every customer ourselves. Tell us how your team runs outbound today.
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