What is isDisposable used for?

isDisposable is a disposable email detection service with an offline npm package, a real-time API with DNS analysis and a 0-100 risk score. It is a good fit for blocking fake signups on a SaaS app, cleaning a user list of throwaway addresses and tuning a risk threshold for trial abuse.

Is isDisposable free?

Yes. isDisposable has a free plan, and paid plans start at $9 per month.

Is isDisposable open source?

No. isDisposable is proprietary (closed-source) software. In the API Tools category, open-source options include Nango, CodeChat and ROAPI.

Can I self-host isDisposable?

Yes. Although isDisposable is closed source, it can be self-hosted on your own servers, and the vendor also offers a hosted version.

What are some alternatives to isDisposable?

isDisposable competes with NeverBounce, ZeroBounce and BillionVerify.

isDisposable: features, pricing and alternatives

About isDisposable

isDisposable helps developers keep throwaway email addresses out of their signup forms. It checks an address against a list of more than 160,000 known disposable domains and, for unknown ones, runs live DNS and MX analysis to catch temporary mail providers that are not on the list yet. The product is described as open source and built for developers.

Detection works in layers. The npm package @isdisposable/js checks the blocklist offline in about two milliseconds, with no API key and no network request. The hosted API adds DNS fingerprinting, such as self-referencing MX records and suspicious IP addresses, and returns a risk score from 0 to 100 along with a reason and domain age, so you can set your own threshold.

Every API check is logged to a dashboard that tracks block rates and the most common disposable domains. The free plan includes 100 checks per month with no credit card, and the site links documentation, a blog, pricing and a GitHub repository.

Key features

Offline blocklist of 160,000+ disposable domains
Real-time DNS and MX analysis
Risk score from 0 to 100
One-line npm package with no API key
JSON API response with reason and domain age
Dashboard of checks and block rate

Good fit for

Blocking fake signups on a SaaS app
Cleaning a user list of throwaway addresses
Tuning a risk threshold for trial abuse

Tags: email-validation; disposable-email; api; anti-abuse; npm; open-source; fraud-prevention

isDisposable: questions and answers

What is isDisposable used for?: isDisposable is a disposable email detection service with an offline npm package, a real-time API with DNS analysis and a 0-100 risk score. It is a good fit for blocking fake signups on a SaaS app, cleaning a user list of throwaway addresses and tuning a risk threshold for trial abuse.
Is isDisposable free?: Yes. isDisposable has a free plan, and paid plans start at $9 per month.
Is isDisposable open source?: No. isDisposable is proprietary (closed-source) software. In the API Tools category, open-source options include Nango, CodeChat and ROAPI.
Can I self-host isDisposable?: Yes. Although isDisposable is closed source, it can be self-hosted on your own servers, and the vendor also offers a hosted version.
What are some alternatives to isDisposable?: isDisposable competes with NeverBounce, ZeroBounce and BillionVerify.