In this article, we’ll go over the pros, cons, and pricing of this service in 2025.
Let’s see if it meets your needs or if you need another tool for email marketing:
What is the NeverBounce API?
The NeverBounce API is a tool that checks if email addresses are real or not.
It helps businesses keep their email lists clean by verifying individual emails or big lists. You can create custom setups with an API key and secret key to send requests and get results.
This prevents you from sending emails to invalid addresses. As a result, you save time and improve email delivery.
Pros of NeverBounce Verification API
NeverBounce’s API is characterized by the following advantages:
Real-time email verification
It helps you add email verification in real-time, so you can be sure you’re working with valid addresses from the start. As a result of sending a request to the API, you can instantly check the status of any email. This is useful for sign-ups or forms, as it stops invalid or fake emails from entering your system.
Custom integrations with API keys
You can create custom integrations easily with this tool thanks to unique API keys for different apps or services.
This gives you detailed control and advanced reporting. Each integration has its own set of API credentials, so you can manage different projects under the same account.
Secure authentication with a secret key
Security is built into the system with the use of API credentials like your API username and secret key. These are required for all requests so that only authorized users can access and verify emails. If anything seems off, you can reset the keys from your dashboard at any time.
Bulk verification through the download endpoint
NeverBounce’s download endpoint lets you verify huge email lists without having to upload files manually. You can either provide a direct URL to a CSV file or send the data directly in the body of the request. Once the process is complete, you’ll get a breakdown of results like valid, invalid, and disposable emails.
Flexible solutions for large lists
NeverBounce offers solutions for verifying both individual emails and entire lists, no matter the size. For larger lists, the API can handle the process automatically, and you can check the status by polling the API until the job is done. This makes it convenient to keep large contact databases up to date.
Cons of NeverBounce Verification API
Moving on, we’ve examined NeverBounce thoroughly and came across some drawbacks you might want to be aware of:
Not suitable for client-side use
NeverBounce’s API is not built for direct use in the browser. Using it in client-side scripts, like in React or Vue, would expose sensitive API credentials, such as your API key and secret key, to the public. This means you’ll need to rely on server-side code, which can add more development work.
Polling for large lists can be slow
If you’re verifying large lists, it can take some time to get results. You need to poll the API to check the status of the job until it’s finished. For smaller lists, this happens fairly quickly, but for lists with over 50,000 emails, it can require some patience, as results aren’t instant.
Credit-based system
Every verification request costs credits. So, if your account runs out of credits, your verifications will fail. Should you have a large list to verify, you’ll need to make sure you have enough credits upfront, which could add unexpected costs.
Limited to 10 jobs at once
The API can only handle 10 concurrent jobs and a maximum of 50 runs per day. Dealing with a massive number of emails or multiple lists could slow down the process. You may need to wait for jobs to finish before starting new ones, which could be frustrating if you’re in a hurry.
Possible timeouts for slow servers
Some email servers, especially smaller ones, can take a long time to respond. In these cases, you might hit timeouts during the verification process. The API treats these as unknowns, so you might not get a clear answer for every email.
NeverBounce API Pricing in 2025
You use credits for every email verification, with 1 credit equaling 1 verified email.
You can use credits through the API.
When you run out of the free 10 credits that come with a new account, you’ll need to add a default payment method. If you don’t, the API will stop processing requests after the free credits are used.
Buying credits in bulk is cheaper.
For example, instead of buying smaller amounts for each batch, you could buy 50,000 credits at once and save money in the long run. You can also set up monthly invoicing if you’re verifying large numbers of emails regularly.
The cost per email goes down as the number of emails verified increases. For smaller lists, the price is $0.008 per email, but this drops to $0.003 if you’re verifying up to a million emails. For even larger projects, custom enterprise packages are available.
How NeverBounce API Compares to Bouncer’s API
If you’re still unsure of whether NeverBounce is the one for you, let us introduce you to another fantastic tool: Bouncer.
Both NeverBounce and Bouncer offer solid email verification, but there are a few differences worth noting:
Accuracy
NeverBounce focuses on delivering high accuracy by checking multiple factors like syntax, domain, and mailbox existence.
Bouncer also checks for similar factors but takes it a step further by evaluating the “toxicity” of an email address. Bouncer flags emails that have been linked to spam or abusive behavior, giving you an extra layer of protection.
Response times
NeverBounce processes email addresses pretty fast, especially smaller lists.
But Bouncer has a slight edge in real-time speed. It has both real-time (synchronous) and batch-processing options, and they are known for being ultrafast, which is important when working with time-sensitive emails.
Customer support
Both platforms provide strong customer support, but Bouncer offers a more personalized touch.
With options to reach out via email and a more approachable setup for generating your API key, Bouncer feels more hands-on. NeverBounce’s support is reliable, though it leans more on standard help desk solutions.
Error handling
NeverBounce’s error handling uses HTTP response codes to notify you of issues.
Bouncer does the same but adds more specific handling for situations like rate limits and account credit issues. Bouncer also suggests retries for temporary errors, which can be helpful when email servers are slow.
Unique features
One of Bouncer’s standout features is the “Did You Mean” field. When an email address is found to be undeliverable, Bouncer tries to suggest a possible correction.
NeverBounce doesn’t have this feature, so Bouncer outperforms it here.
In short, both APIs are strong players, but Bouncer offers a few extra perks that might make it a better choice for businesses focused on speed and additional email security measures.
Check out all Bouncer API features.
Wrapping up
In the end, NeverBounce is a solid choice for cleaning up your email lists with its real-time verification, bulk options, and secure system.
However, it’s not without its downsides, like the credit-based system and slower performance with large lists.
If you need faster response times or extra protection against spammy emails, Bouncer could be a better fit.
So are you ready to upgrade your email verification?
Try Bouncer today and see the difference.
