A customdomain.ai alternative: DoDomain vs customdomain.ai

Read the meters side by side before the prices: DoDomain counts per month and refuses new sessions at the cap rather than billing overage; customdomain.ai counts per year, and each hostname counts once, so customer.com and app.customer.com are two connections. A product onboarding 40 customers a month sits inside DoDomain's Free plan; on customdomain.ai that is 480 connections a year, which is Startup ($149/mo) territory, not Starter.

customdomain.ai prices flat tiers: a monthly fee buys a yearly allowance of connections, and its pricing page says there is no metering inside a tier. That makes the bill easy to forecast, as long as your growth fits a tier. Past Growth's allowance, the pricing page describes overage in 1,000-domain blocks, and Premium and Enterprise are custom-priced; none of those prices is published. Starter is the only plan that is blocked rather than billed past its allowance, and the pricing page says nothing already live is cut off over volume.

DoDomain meters a verified connection, once, in the month it first goes live. Live domains cost nothing to keep: re-checks and drift monitoring are free and uncapped on every plan. The allowance is a hard cap with no overage billing, so past it new sessions are refused with a 402 quota_exceeded until the next billing month or an upgrade, and existing connections keep working.

List prices, monthly billing. DoDomain counts a domain once, in the month it first verifies; re-checks and drift monitoring are free on every plan, so live domains add nothing. One-click setup starts on Pro: a cheaper plan above is the guided-records flow. customdomain.ai's column is the cheapest priced tier whose yearly allowance covers the scenario (per customdomain.ai and customdomain.ai/pricing, retrieved 2026-10-06); past 600 a year only Growth overage, Premium or Enterprise apply, and none of their prices is published. It excludes any overage and the cost of its edge beyond the Growth tier.

The honest reading: at launch volume the question is whether a $149 flat tier or a free plan with a monthly allowance fits better. At higher volume customdomain.ai stops printing numbers, and DoDomain's published price list runs through Scale at $99 per month. If you do not need its edge, you also avoid paying for the part of Growth that is not DNS.

The Domain Connect protocol has a structural gap: a DNS provider that accepts a signed apply has no way to tell the service provider whether the write actually landed. Any product that treats the apply redirect as success is trusting a callback, and both products here say they do not. customdomain.ai's docs put it as "a return that reports success is never taken as proof: only public DNS promotes the connection." DoDomain reads the domain's authoritative nameservers on every path (OAuth, Domain Connect, manual) and only then records the connection, meters it, and signs the connection.verified webhook.

The mechanics differ slightly. customdomain.ai's poller resolves each record against public DNS and, when the public answer is stale, asks the zone's own nameservers, requiring every one that answers to serve the record. DoDomain goes to the authoritative nameservers directly. In practice both avoid the failure that matters, a callback standing in for proof, and which read comes first changes how quickly a correct record is confirmed more than whether a wrong one is accepted.

After go-live, the difference is cadence and action. customdomain.ai checks hourly and, where it holds continuous access and repair is on, puts a missing record back; a changed record is never overwritten and repairs stop after 3 per 24 hours. DoDomain checks every 10 minutes in a connection's first day, when most breakage happens, then hourly for a week and every 6 hours after, and it reports rather than repairs: three confirmed checks, then connection.failed naming the records. If you want a vendor that fixes DNS for you, that is a real point for customdomain.ai. If you want the decision kept in your product, it is a point for DoDomain.

customdomain.ai and DoDomain are head-to-head at the DNS layer, so the record in a session points the customer's domain at your host. Here that is a CNAME from app.customer.com to cname.yourapp.com. If you chose customdomain.ai's edge, its record would point at its own proxy instead; DoDomain has no equivalent because it never serves the traffic.

The integration is three pieces: a server call that creates the session, a page that opens the connect sheet, and a webhook route that marks the domain live. The records array takes A, AAAA, CNAME, TXT and MX, so an ownership-proof TXT or an apex A record is a second entry in the same call, not a second integration.

// 1. Your server: mint a connect session for the customer's domain.
import { DoDomain, verifyWebhook } from "@dodomain/node";
import { env } from "./env"; // your validated server env

const dodomain = new DoDomain({ secretKey: env.DODOMAIN_SECRET_KEY });
const session = await dodomain.sessions.create({
  domain: "customer.com",
  records: [
    { type: "CNAME", host: "app", value: "cname.yourapp.com" },
  ],
  returnUrl: "https://yourapp.com/settings/domains",
});

// 2. Your page: open the connect sheet with session.token.
import { showDoDomain } from "@dodomain/connect";

showDoDomain({ token, onVerified: ({ domain }) => markDomainLive(domain) });

// 3. Your webhook route: DoDomain calls it once the record is live at the
//    domain's authoritative nameservers, and again if it ever breaks.
if (!verifyWebhook(env.DODOMAIN_WEBHOOK_SECRET, rawBody, signatureHeader)) {
  return new Response("bad signature", { status: 400 });
}

From Pro up, the session picks the path on its own: a Cloudflare-hosted domain gets the OAuth one-click, a provider that has enabled DoDomain's Domain Connect templates gets a signed apply, and every other provider gets step-by-step records for that provider's dashboard. On the free plan every provider gets the step-by-step records. The full walkthrough is in the quickstart.

Pick DoDomain when your product already serves custom hostnames somewhere else (Vercel, Caddy, Cloudflare for SaaS) and the missing piece is getting records written correctly and noticing when they break. It fits teams that want a free plan with a monthly allowance to build against, a published price list through Scale, a monitoring schedule that is densest right after setup, and no automatic changes to a customer's zone.

Pick customdomain.ai when you want the vendor to carry more of the stack: an edge with automatic HTTPS, domain registration and resale, managed DNS, auto-repair, a wider record vocabulary, or a self-hosted deployment. Pick it too when your customers' providers are mostly on its automatic list and the entry price matters more than the monthly allowance.

Switching is incremental. DoDomain touches only the customer's DNS and your own code, so you can send new customers through a DoDomain session and leave domains already connected on customdomain.ai alone. If you used its edge, keep serving from it until you have a replacement, since DoDomain will not take that role; DoDomain's SSL guide covers the hosts that do. DoDomain's docs describe no bulk import of domains connected elsewhere, so each domain DoDomain should monitor goes through its own session. Wire the webhook first, with verifyWebhook from @dodomain/node, because that is what your product reacts to.

Honest flip side, strongest points first. customdomain.ai will be your edge if you want it to: from Growth it serves customer domains from a reverse proxy with on-demand Let's Encrypt certificates, and its docs say connecting and serving are separate planes, with the API never in the proxied request path. DoDomain does not serve traffic at all.

Its entry price is also lower in absolute terms for a small, steady product that needs the edge or its extra features: $149 a month for 600 connections a year, against our $29 Pro for a month's allowance. Its Domain Connect footprint is larger, with 18 templates published to the public registry, and the Starter trial lets you test before paying.

The rest is breadth. A wider record vocabulary (ALIAS/ANAME, CAA and 301 redirects besides the usual types), auto-repair of missing records where it holds continuous access, domain registration and resale, a managed DNS option, a self-hosted quickstart, a 67-endpoint REST API, share links, and about 90 white-label tokens in 13 locales. It routes 63 providers and says 150+ are known. DoDomain offers none of registration, managed DNS or self-hosting. On the other side of the ledger, customdomain.ai states that SOC 2 and ISO 27001 are in progress and that it is not yet certified, publishes no founding date or customer names, and the pages disagree with each other on provider counts and tier features. Ask before you rely on a number.

Where DoDomain earns its place is a free plan with a monthly allowance, published self-serve pricing with no overage, drift checks every 10 minutes right after setup, authoritative-nameserver verification on every path, and an architecture that is never in your request path.

No card, no sales call: create an app, mint a session, and watch the first domain verify.

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