customdomain.ai alternative in 2026: the unit is connections per year
Custom Domain (customdomain.ai) charges $149 a month for 600 domain connections a year, or $649 for 600 plus overage bought in 1,000-domain blocks at a price it does not publish. Domainee charges $0.20 per live domain per month after 50 free. Those are different units, and the unit is the whole comparison.
I went through their pricing, product and how-it-works pages on 2 September 2026 and did the math at six scales. The short version: we are cheaper on sticker up to about 3,500 domains, they are cheaper above it, and the number where that flips is more interesting than either headline.
I build Domainee, so read this the way you would read any comparison written by one of the two parties. Every number below is from their published pages or ours, and the table that goes against us is in here too.
What Custom Domain charges
From their pricing page, verbatim:
| Tier | Price | Included | Past the allowance |
|---|---|---|---|
| Starter | $0 | 10 domain connections per year | Blocked |
| Startup | $149/mo | 600 domain connections/yr | Not blocked |
| Growth | $649/mo | 600/yr plus overage | Overage in 1,000-domain blocks |
| Premium | Custom | 12,000 domain connections/yr | Not blocked |
| Enterprise | Custom | 12,000+ | Overage in 1,000 blocks |
Everything self-serve includes the connect engine, an embeddable widget and SDK, REST API and webhooks, DNS drift detection, and an MCP server. Audit trail starts at Premium. White-label branding and domain resale are Enterprise only.
Their framing is "flat tiers with included volume. No metering, no surprises at the end of the month." That is a real benefit and it is the honest reason someone picks this model: a fixed line item is easier to defend in a budget than a variable one.
The unit is connections per year, not domains per month
This is the part to get straight before comparing anything. Their allowance counts connection events over a year. Ours counts domains that are live this month.
Those diverge in a specific way. If a customer connects, churns three months later, and comes back in the autumn, Custom Domain has counted two connections against your annual allowance and Domainee has billed you for the months the domain was actually serving. Run a product with real churn, or one where customers connect a domain to try it and disconnect, and the annual counter moves faster than your live domain count does.
It also diverges in your favour in the opposite case. Connect 5,000 domains once, keep every one of them, add nothing next year, and in year two Custom Domain bills a flat subscription while Domainee keeps charging per live domain per month. Low churn at high volume is the shape their model is built for, and it genuinely wins there.
The math at six scales
Year one, every domain connected once and held. Domainee's rate is graduated: 50 free, $0.20 each to 1,000, then dropping a cent per thousand to $0.10 above 10,000.
| Live domains | Domainee / mo | Domainee / yr | Custom Domain tier | Their sticker / yr |
|---|---|---|---|---|
| 10 | $0 | $0 | Starter | $0 |
| 50 | $0 | $0 | Startup ($149/mo) | $1,788 |
| 100 | $10 | $120 | Startup | $1,788 |
| 600 | $110 | $1,320 | Startup | $1,788 |
| 1,000 | $190 | $2,280 | Growth ($649/mo) | $7,788 |
| 5,000 | $890 | $10,680 | Growth + overage | $7,788 plus blocks |
Two things worth pulling out of that table.
At 50 domains the gap is the whole price. Their free tier is 10 connections a year and hard-blocks at the limit. Ours is 50 live domains with no block. So the first real pilot, the one where you connect a few dozen beta customers, costs $1,788 a year on one and nothing on the other. If you are still proving the feature works, that is the number that matters.
At 5,000 the sticker goes their way. $890 a month against a $649 sticker. That is a genuine loss for us on price and I would rather say so than build a table that hides it.
Where the crossover actually is
Domainee's monthly bill passes the $649 Growth sticker at 3,524 live domains. Below that we are cheaper, above it their headline is.
The reason I say "headline" is that the Growth tier includes 600 connections a year, not 3,524. Everything above the included volume is overage sold in 1,000-domain blocks, and the block price is not published anywhere on the pricing page. So at 5,000 domains their real annual cost is $7,788 plus roughly four blocks at a rate you have to ask for.
That is not a criticism of the number being high. It might be low. It is that above about 1,600 domains their published price stops describing your bill, which is the same structural thing we found when we costed Cloudflare for SaaS: a clean per-unit rate that covers one configuration, and a quote for the configuration you grow into.
If you want to run your own numbers on our side, the custom domain cost calculator does the graduated math, and every rate is on the pricing page.
What the pricing page does not settle
One thing I could not answer from their site, and it is not a small one. The pricing page carries a feature comparison table it introduces as "every row is what the platform actually enforces, taken from the same plan catalog the API serves." That table has rows for connections, blocking, the connect engine, the widget, the API, drift detection, MCP, audit trail and white-label.
It has no row for the reverse-proxy edge. The edge appears once, as a bullet on the Growth card reading "Reverse-proxy edge + automatic HTTPS." Meanwhile their how-it-works page describes the edge as core to the product, with certificates issued inside the first TLS handshake for a new hostname.
So: does Startup at $149 serve your traffic and terminate TLS, or does it configure DNS and stop? Their own two pages point different directions, and the table they describe as authoritative does not cover it. Ask before you buy, because it is the difference between a DNS automation tool and a hosting layer. It is also, checked on 2 September 2026, the single question I would most want answered on that page.
There is also no published bandwidth allowance or overage rate anywhere. If the edge serves your traffic, something is metering it. Ours is 100 GB free, 400 GB included on paid plans, $0.05 per GB after.
Where Custom Domain is genuinely good
I do not think this is a weak product, and a comparison that pretends otherwise is not worth reading.
The auto-configuration is the real feature. They fingerprint the customer's DNS host from public records and pick a connect path per provider: OAuth where the provider supports it, a scoped token otherwise, and a guided manual step where neither exists. That covers a claimed 63 providers. If your support burden is customers failing to paste a CNAME correctly, that burden is what they are selling to remove, and removing it is worth money.
Certificates issue inside the handshake. On-demand issuance triggered by the first TLS connection for a new hostname, then cached and renewed. That is the right primitive, and it is the same one Caddy's on-demand TLS uses.
MCP on every tier, including free. Agent access is not upsold. We publish an MCP server too, and I think both of us being here is a sign of where this category is going rather than a differentiator for either.
Drift detection is not gated. Their table includes it from Starter up. Customers changing DNS months after going live is the failure mode that actually bites in production, so shipping the check at every tier is the right call.
Where the auto-config has a cost worth naming
To write records into a customer's zone over OAuth, the customer grants a third party write access at their DNS provider. Their own feature copy lists what gets written: A, CNAME, TXT, MX, SPF and DKIM.
MX, SPF and DKIM are mail. That is a substantially larger grant than "point one hostname at a vendor," and it is the same trade we looked at in white label DNS, where taking nameserver delegation makes you responsible for a customer's mail routing. The scope here is narrower than an NS delegation and wider than a CNAME.
Whether that matters depends on your customers. A creator connecting a portfolio domain will not care. A customer with a security review will ask what write scope you are requesting on their DNS and who holds the token, and "we ask for write access so onboarding is one click" is an answer you need to be ready to give. Worth knowing which conversation you are buying.
Domainee's model is the narrow one: the customer adds one CNAME in DNS they keep controlling, and nothing we hold can write to their zone. That is more setup friction and less blast radius. It is a trade, not a win.
Which one to pick
Pick Custom Domain if onboarding friction is your actual problem, your customers are non-technical, your churn is low, and you are past a few thousand domains where the flat tier prices well. The auto-config is the strongest version of that idea I have seen priced self-serve.
Pick Domainee if you are under a few thousand domains, you want the first 50 free while you prove the feature, you would rather pay for what is live than for connection events, or you need every rate published rather than quoted. The side-by-side has the feature grid.
Pick neither if you are already deep in Cloudflare and subdomains are enough for your customers, in which case Cloudflare for SaaS at $0.10 a hostname is hard to beat until you need apex domains.
For the wider field, best custom domain APIs compares five of us on year-one cost, the custom domains as a service entry covers the category, and multi-tenant custom domains covers the architecture underneath. If the auto-config approach is what interests you, Entri is the other product built around it, and the Domain Connect protocol entry explains the standard that approach usually leans on, including why registrar-based discovery is less reliable than it looks.
FAQ
How much does customdomain.ai cost?
Starter is free for 10 domain connections a year and blocks once you use them. Startup is $149 a month for 600 connections a year. Growth is $649 a month for 600 plus overage in 1,000-domain blocks at an unpublished price. Premium and Enterprise are quoted, at 12,000 connections a year and up.
Is Custom Domain cheaper than Domainee?
Below roughly 3,500 live domains, no. At 100 domains it is $1,788 a year against $120. The two cross at 3,524 live domains, where our graduated per-domain rate passes their $649 monthly sticker. Above that their headline is lower, though the part above their included 600 connections is overage at a price they do not publish.
What is a "domain connection per year"?
It is a connection event, not a live domain. Connecting the same customer twice in a year, after a churn and a win-back, spends two. That is the core difference from per-live-domain-per-month billing, and it is why the comparison depends on your churn rate rather than just your customer count.
Does the $149 plan include the proxy edge and HTTPS?
Unclear from their pricing page, which is worth resolving before you buy. The reverse-proxy edge appears as a bullet on the $649 Growth card and does not appear at all in the feature table the page describes as reflecting what the platform enforces, while the how-it-works page presents the edge as central to the product. Ask them directly.
Does Custom Domain support AI agents?
Yes, they publish an MCP server and include it on every tier including the free one. So does Domainee, on the free tier as well. This is no longer a differentiator between the two.
What does Domainee cost by comparison?
50 custom domains and 100 GB of bandwidth free forever, then $0.20 per domain per month with graduated volume discounts falling to $0.10 above 10,000 domains. Paid plans include 400 GB of bandwidth, then $0.05 per GB. Every rate is published, and there is no connection counter.