Gaitle
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Ask for a reply.
Land in the inbox.

Gaitle sends each new signup one short email from you, asking them to reply. One reply shows Gmail your domain can be trusted, so every email after it reaches the inbox.

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Free for 100 users · no card · live in 5 min
Try it: reply as Maya and watch where Acme's next emails go →
founder@acme.cojust now
hey Maya, quick favor
i'm the founder of Acme. gmail decides whether our emails reach you based on whether you reply. could you reply with just "hi"? it takes 3 seconds.
SPAM / PROMOTIONS
Welcome to Acme
Reset your password
Your receipt #1042
PRIMARY INBOX
"It tells their email provider that emails from my business are legit. Totally recommended!"
Marc Lou, indie maker · tweet ↗He built this trick into his own products by hand. Gaitle automates it for you.

SPF, DKIM and DMARC say you're allowed to send. A reply says people want your email.

A new domain starts with zero trustGmail has no engagement history for you, so it plays it safe and sends your mail to Promotions or Spam.
DNS fixes don't change thatThey prove you're allowed to send. They say nothing about whether anyone wants your email.
Replies improve your reputationEach reply builds your domain's reputation, and that raises inbox placement for all your recipients, not just the ones who replied.

Live in five minutes.

1Connect your senderPaste a Resend, Postmark or Mailgun key. Mail goes out from your domain.
2Pick your nudgeStart from a template tested for replies, or write your own.
3Call one webhookCall it on signup from Stripe, Clerk or your backend. That's all the setup there is.
POST /v1/signups { email, name }

See whether it's working.

82
REPLY HEALTHExcellent30.9% reply rate · 0.02% complaints
Explore all features →
Reply Health scoreReply rate, complaints and bounces combined into one 0–100 score.Subject A/B testingTest subject lines automatically. The one with the most replies wins.Replies come to youEvery reply is forwarded to your inbox, so you can talk to users directly.Protect critical emailsAdd a reply nudge to password resets and billing alerts.Domain warm-upDaily send limits for new domains. Extra sends wait until tomorrow.Complaint guardrailsOne-click unsubscribe and live complaint tracking keep you under 0.1%.
$0for your first 100 users.
Every feature is included. You only pay once it's working.One email per signup, never a sequence. Your keys, your domain. Cancel in one click.
Start free →Paid plans

Good questions.

How does asking users to reply improve email deliverability?+

Inbox providers like Gmail and Outlook treat a reply as the strongest possible signal that a recipient wants to hear from you. When a new user replies — even with a single word — the provider records genuine two-way engagement and raises your sender reputation. Higher reputation means future transactional emails (welcome messages, password resets, billing alerts) land in the inbox instead of Spam or Promotions.

What is Gaitle?+

Gaitle is a micro-SaaS tool that automatically sends one friendly 'please reply' email the moment a user signs up for your product. That single reply creates a real engagement signal that improves long-term deliverability for all of your important emails. It is a deliverability tool, not a marketing tool — exactly one email per signup, never a drip sequence.

Why do my welcome emails land in Spam or the Promotions tab?+

New sending domains have no engagement history, so providers are cautious and often route one-way bulk-looking mail to Spam or Promotions. SPF, DKIM and DMARC prove you are allowed to send, but they do not prove that people want your email. Replies do. Gaitle generates that missing engagement signal at signup, when users are most willing to act.

Does Gaitle send email from its own servers?+

No. You connect your own provider (Resend, Postmark, or Mailgun) with your own API key and verified domain. Every nudge is sent from your domain and your sending reputation — Gaitle never uses a shared IP and never sees your account password. Your API key is stored encrypted server-side.

How long does Gaitle take to set up?+

Under five minutes. Connect a sending provider, customize your one-line nudge template, and point your signup webhook (from Stripe, Clerk, Supabase, or your own backend) at the Gaitle endpoint. New signups are nudged automatically from then on.

How much does Gaitle cost?+

Gaitle is free for your first 100 users, with paid Starter and Pro plans for growing SaaS. You can cancel in one click and export your data at any time.

Is this the same trick indie hackers like Marc Lou recommend?+

Yes. Many indie founders manually add a 'send yourself an email and reply to it' step to warm up their domain. Gaitle automates that exact pattern for every signup, tracks the replies, and reports the deliverability lift — so you never have to wire it up by hand.

Make sure your next signup gets your email.

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Free for 100 users · no card · cancel in one click
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