Email for solo builders
AI writes your cold outreach sequences and sorts the replies on its own. Deliverability guardrails are built in. And when a prospect says yes, they're one click away from your newsletter — same tool, same contact base.
Plug in your Gmail, Outlook or SMTP — your reputation stays yours.
Built in public by a solo builder — prospected with Sendwren itself.
The product
Sendwren scans your inbox over IMAP every five minutes. Each reply is read by AI and sorted — sequences stop automatically, and the interesting ones surface.
Re: Quick question about Stackline
Hey David — actually yes, this is exactly the kind of thing we've been hacking around with spreadsheets. Do you have 20 minutes this week?
How it works
Gmail, Outlook or any SMTP. Guided SPF, DKIM and DMARC checks — green ticks before you send a single email. Passwords encrypted, reputation yours.
The AI drafts your whole sequence — steps, delays, A/B variants, threaded follow-ups. It arrives paused. You read it, tweak it, launch it.
Interested, not interested, out-of-office, unsubscribe. Sequences stop on reply. The ones who said yes join your newsletter in one click.
The prospect who said yes becomes a subscriber — same contact, same history, no CSV exports. From your first cold email to every newsletter you'll ever send, one tool keeps the whole relationship.
Deliverability
Cold email goes wrong when tools let you do whatever you want. Sendwren ships with opinions — the ones that keep you out of the spam folder.
Daily limits grow with account age, automatically. A fresh inbox never blasts 200 emails on day one.
The moment someone answers, their sequence ends. Nobody gets a follow-up after saying no.
RFC 8058 List-Unsubscribe headers on everything — required by Gmail and Yahoo, handled for you.
Addresses checked before sending. Invalid contacts are skipped, not bounced against your domain.
Follow-ups land in the same thread with a proper “Re:” — like a human wrote them, because one reviewed them.
Open and click tracking per campaign, off whenever you want — pixels can hurt deliverability, so you decide.
Pricing
The tools this replaces start at $37/month for cold email, plus $33/month for your newsletter. You're one person, not a stack.
Kick the tires, land a customer.
$0 forever
Everything, for one builder.
$19 /month
or $190/year — 2 months free
14-day Pro trial — then $19/month, or drop back to Free.
FAQ
No. You connect the inbox you already own — Gmail, Outlook, or any SMTP/IMAP provider. Sendwren never sends from shared infrastructure, so your deliverability is never hostage to someone else's spam.
Done carelessly, yes — which is why the careful parts aren't optional here. Send ramps, address verification, auto-stop on reply, one-click unsubscribe and guided DNS checks are all defaults, not add-ons.
Two things. It writes your sequences — steps, delays, A/B variants — from a description of your product and target; every sequence arrives paused for your review. And it classifies replies so your stats mean something. It never sends anything you haven't read.
It's built for one person — no seats, no roles, no pipeline reviews. If you need a sales floor, the $97/month tools will treat you well.
One-click unsubscribe on every email, a real unsubscribe page, contact export and deletion, and terms that prohibit purchased lists. The newsletter side is opt-in only.
Contacts and reply classification: yes, genuinely. AI sequence generation has a fair-use limit of 100 per month — that's three new sequences a day, and if you legitimately need more, email me and I'll raise it. The limits that exist are there to keep spammers out, not to upsell you.
Send + wren. The wren weighs nine grams and sings louder for its size than any bird in Europe — you hear it hundreds of meters before you see it. That's the product: one solo builder, tiny next to the sales teams, whose emails carry. (The wren also compulsively builds several nests before picking one. We don't know any builders like that.)
Set up in 10 minutes. The free plan is actually useful.