Sellbird (formerly Harvey)
Outreach platform that finds prospects, verifies emails, writes cold emails and handles replies.
Runs on your Claude or ChatGPT plan, and nothing is sent until you approve it.
Sellbird (formerly Harvey) finds companies that need what you sell, finds the person who decides, checks their email address, writes each one a cold email and handles the replies. It suits founders and small sales teams who are comfortable on the command line and want outreach on their own machine.
What it is
It runs a pipeline on your machine: find companies on OpenStreetMap or a paid source you pick, read each company's website for buying signals you confirmed, find the owner or manager, verify one address and write a short email sequence. It thinks through the Claude Code CLI or Codex on your existing plan, so there is no model API key or per-token bill.
Who it's for
Suits technical founders, agencies and sales people who can run Python, set up a sending mailbox and warm it up. It does not suit anyone who wants a point-and-click app with no setup; the project's own hosted version at sellbird.ai is in early access for that.
Key features
Free prospect discovery
Finds businesses on OpenStreetMap at no cost, or on a paid source whose cost is shown before each search.
Signals from company websites
Reads each site for buying signals you confirmed, such as no online booking or ads running, with no model calls.
Email address checking
Learns each company's email pattern and marks every address verified, risky, guess or invalid; only deliverable ones are sent to.
Outbox approval
Every email waits for your approval until you turn on autopilot, and a pre-send check rejects unfilled merge tags and extra links.
Reply handling
Reads replies, drafts answers, sets auto-replies aside, honours opt-outs at once and hands you anything it should not answer alone.
Subscription-backed model use
Uses the Claude Code CLI or Codex on your own plan and throttles itself to leave room for your work.
Up and running in 3 steps
Our honest verdict
What's great
- No model API key or per-token bill: it runs through the Claude Code CLI or Codex on a plan you already pay for.
- No prospecting database needed: discovery is free on OpenStreetMap and website signals cost no model calls.
- Pre-send checks with no model involved reject unfilled merge tags, banned phrases, extra links and undeliverable addresses.
- Every email waits in the Outbox for your approval by default, with a single command to pause all sending.
Where it falls short
- Needs Python 3.11 or newer, a signed-in Claude or Codex CLI, and comfort with the terminal.
- You must supply a sending mailbox (Google Workspace, Microsoft 365 or SMTP), ideally on a separate domain, and warm it up before cold email.
- The licence changed: Harvey releases up to 0.3.x were MIT, but Sellbird is AGPL-3.0, which matters if you plan to offer it as a network service.
- The README says the hosted version is early access, and cold email carries legal and deliverability rules you are responsible for.
Pricing & license
The software is free under AGPL-3.0, and model use is covered by your Claude Pro or Max plan, or a ChatGPT plan with Codex. You still pay for a sending mailbox (the README quotes about $7 a month for Google Workspace) and warmup. A hosted version at sellbird.ai is in early access; no price is shown.
Open remote AI-training roles
767 open remote AI-training roles, updated November 14, 2026; most pay $20–$175 an hour. Zekai lists them free; the application goes to the employer’s platform.
Alternatives
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FAQ
Is Harvey the same project as Sellbird?
Yes. Harvey was renamed Sellbird in version 0.4.0 with the same history, and your configuration, data and dashboard sign-in carry over when you pull and reinstall.
Will Sellbird send emails without my approval?
Not by default. Every email waits in the Outbox until you approve it, unless you turn on autopilot yourself, and sellbird sending pause stops everything at once.
Does it need a model API key?
No. It uses the Claude Code CLI on a Claude Pro or Max plan, or Codex on a ChatGPT plan, so there is no API key or per-token billing, but you do need one of those plans.
