Bring-your-own-domain, without the DNS

Your customers connect a domain without ever touching DNS.

They sign in to wherever they bought it — GoDaddy, Namecheap, Cloudflare — and authorize once. Connect Domain writes the records, verifies ownership, issues HTTPS, and serves the traffic. No DNS panel. No copy-paste records. No support tickets.

Get started Read the docs

Open source & self-hostable — the open alternative to Entri, from $0.

Connect your domain

Authorize Connect Domain

✓DNS written, verified, and HTTPS issued — automatically.

How it works

Three phases. One API call to start them.

From the hostname a customer types to a live, HTTPS-terminated domain served at your edge — Connect Domain runs the whole path and reports every state along the way.

01
Detect & write
Point a hostname at Connect Domain. It fingerprints the DNS host and writes the records for you across 18 providers — or hands off a signed, one-click Domain Connect. Where a provider can’t be automated, the customer gets exact copy-paste records and a live check.
02
Verify & secure
A domain goes live only once ownership is proven — value-checked, not merely present. HTTPS is then issued and renewed on demand at the edge with Let’s Encrypt. Nothing to buy, install, or rotate.
03
Serve at the edge
The reverse-proxy edge terminates TLS for the connected domain and routes traffic to your origin. Webhooks fire the moment a domain is added, verified, goes live, or drifts out of configuration.

What we write for them

The records, handled.

No customer ever sees a DNS panel if their provider supports automatic setup. When it doesn’t, they get the exact records to paste and a one-click check. Ownership is proven before a domain goes live.

How DNS auto-config works →

records · example

TYPE   NAME               VALUE                     TTL
CNAME  app.acme.com       edge.connectdomain.app    3600
TXT    _cd.acme.com       cd-verify=…               3600
A      acme.com           203.0.113.10              300

Everything in the box

Everything you need to offer custom domains

Nine building blocks. One clean flow. All open source.

Automatic DNS setup

Detects the provider and writes records across 18 DNS providers — or via a signed one-click Domain Connect.

Live provider detection

As the customer types their domain, show which DNS host it uses — so the flow feels instant.

Automatic HTTPS

Certificates issued and renewed on-demand at the edge with Let’s Encrypt. No cert wrangling.

Reverse-proxy edge

Terminate TLS for the connected domain and route traffic to your origin.

Ownership verification

A domain goes live only once control is proven — value-checked, not existence-checked.

REST API

A clean API for machines and a console for humans. Integrate once, offer domains to everyone.

Webhooks

Know the moment a domain is added, verified, goes live, or drifts out of configuration.

Multi-tenant

Every account is isolated; per-tenant API keys are sealed at rest.

Self-host or hosted

Run it on your own cloud, or use the hosted service. Your customers’ DNS credentials stay with you.

Built API-first

One call to offer domains.

A clean REST API for your servers, a console for your team, and an embeddable widget for your customers. Create a connection and Connect Domain drives detection, verification, TLS, and serving to completion — you just watch the webhooks.

POST /v1/connections

curl -X POST https://api.connectdomain.app/v1/connections \
  -H "Authorization: Bearer sk_live_…" \
  -H "Content-Type: application/json" \
  -d '{
    "application_id": "3f2c…",
    "hostname": "app.customer.com"
  }'

201 Created

{
  "id": "c7a1…",
  "application_id": "3f2c…",
  "hostname": "app.customer.com",
  "kind": "subdomain",
  "setup_type": "automatic",
  "state": "pending_ownership",
  "provider": "cloudflare",
  "created_at": "2026-07-03T12:00:00Z"
}

The connection’s desired records — including the ownership TXT — come back from GET /v1/connections/{id}. Full endpoint reference in the docs — or skip code entirely and drop in the widget.

18 providers auto-configured · plus Domain Connect

Every provider your customers use

Cloudflare

Route 53

Google Cloud DNS

Azure DNS

GoDaddy

Namecheap

DigitalOcean

Vercel

Netlify

IONOS

Linode

Vultr

Hetzner

Gandi

deSEC

DNSimple

Porkbun

Name.com

Where a provider can’t be automated, the customer gets exact copy-paste records and a one-click check. Logos are the property of their respective owners and shown to describe interoperability.

Why open

The managed options work until you hit their pricing, their limits, or their black box. Connect Domain is the open alternative — your infrastructure, your data, your terms.

Honest comparison

How it compares to Entri

	Connect Domain	Entri
License	Open source, self-hostable	Closed SaaS
Pricing	Free to self-host	From $249/mo
Automatic HTTPS	Yes — edge, Let’s Encrypt	Yes
Reverse-proxy hosting	Yes	Yes (Power)
Your customers’ data	Stays on your infra	On Entri’s

Read the full comparison →

Give every customer a real domain.

Open source. Self-hostable. No per-domain fees.

Get started View source