Kickbox pricing and review

Reachkit, which publishes this page, sells a cold email platform with verification built in. Kickbox’s prices and rules below come from its own site, help center and terms, checked October 2026.

Kickbox pricing starts at $5 for 500 verifications, and your first 100 are free. The pricing page shows no monthly or yearly plan: you buy one-time credit packs, and one credit checks one address. Checked October 2026.

Above 1 million, prices are custom through sales. Kickbox’s comparison page with NeverBounce also mentions “package options”, which the pricing page doesn’t show. Packs of 10,000 and up got cheaper around July 2026, according to the tracker PricingSaaS: 100,000 fell from $800 to $500. Some review sites still quote the old prices.

The rules around the price:

• Unknown results are free: “If we can’t provide a definitive result to you, we’ll refund the credit.”
• Credits expire one year after purchase, per the terms and help center (the pricing page doesn’t say), and unused credits aren’t refunded.
• Team accounts can share credits, and the pricing page lists no seat fees.
• Email Threat Score costs one more credit per address, but only when it finds a risk score of 1 or higher.
• Nonprofits get 15% off for life.

What a typical setup costs: at about 1,500 new addresses a month, a $70 pack of 10,000 lasts close to seven months, roughly $10.50 a month. A 25,000 pack costs less per check but would outlast the one-year expiry. At 10,000 a month, a $500 pack of 100,000 lasts ten months, about $50 a month.

Kickbox tells you whether an email address can receive mail before you send to it. You upload a list, pull one from an email platform (its integrations page lists 28, among them Mailchimp, Klaviyo and HubSpot), or check addresses as they arrive through its API. A list of 100,000 takes about an hour.

Each address gets one of four results (result guide): deliverable, undeliverable, risky or unknown. Risky covers accept-all, disposable and role addresses like sales@. Unknown means the mail server didn’t answer, and the credit comes back.

Accept-all, also called catch-all, means a domain takes mail for any address, so no check can tell a real inbox from a made-up one. Kickbox flags these but doesn’t settle them. A Sendex score from 0 to 1 rates each address, with anything under 0.5 called high-risk, and the optional Threat Score flags addresses tied to abuse or complaints.

Kickbox also sells deliverability consulting at custom prices. J2 Global, now Ziff Davis, bought it in 2020.

Strengths

• You pay for answers. Unknown results are refunded (pricing). NeverBounce, for one, publishes no such exemption.
• No subscription. Twelve pack sizes start at $5, and the big packs got up to 37.5% cheaper in mid-2026, per PricingSaaS.
• Built for developers. Sandbox keys spend no credits, and limits are published: 25 parallel requests per IP and 8,000 requests a minute (API docs).
• Near the top of a rival’s test. In Hunter’s November 2025 test of 3,000 B2B addresses, Kickbox placed third of 15 at 67.53%, behind Hunter’s own 70.00%. Hunter sells a competing verifier (benchmark).

Drawbacks

• The terms rule out most cold lists. Kickbox’s terms prohibit verifying addresses “obtained from a third party or obtained indirectly without the recipients’ knowledge and consent” or those “of anyone who has not opted-in”, and Kickbox “may immediately suspend or limit the Services” over violations.
• Catch-all results stay open. In a July 2026 test that ZeroBounce, a competing verifier, built from deliberately hard addresses, Kickbox returned 30.25% catch-all and 19.60% unknown on business domains (benchmark).
• An unclear guarantee. The help center mentions a “95% Deliverability Guarantee”, but the terms don’t spell one out and call services “non-refundable”.
• Pricier than NeverBounce at common sizes: $70 against $50 for 10,000, and $500 against $400 for 100,000.

Kickbox rates about 4.5 out of 5 on G2 from about 658 reviews, and Capterra shows 4.4 from 70, per search results in October 2026. The Trustpilot profile has no reviews.

Ease of use leads the praise in G2’s summary, and a Capterra reviewer praised the HubSpot integration. Complaints return to price at volume (“Can be expensive if you’re using it on a large volume,” in a 2021 Capterra review, before the price cut) and many risky or unknown results. A Reddit user warned that “Kickbox doesn’t permit use of their services to verify email addresses that came from a third party” (thread).

Kickbox fits teams that collect their own addresses: signup forms checked in real time, newsletter and ecommerce lists, and CRM records due for a clean. It also suits developers and anyone who checks a few lists a year.

Look elsewhere if your list was bought, scraped or pulled from a lead database for cold outreach, because Kickbox’s terms forbid that use. The same goes for B2B lists heavy in catch-all domains.

My practitioner note: read a verifier’s acceptable-use terms the way you’d read your email provider’s. Pick one whose terms match how your list was built.

• NeverBounce: a ZoomInfo-owned verifier, cheaper at 10,000 ($50) and 100,000 ($400), with a written 3% bounce guarantee. See the NeverBounce profile.
• ZeroBounce: returns verdicts on many catch-alls at Microsoft 365 and Google Workspace domains, and doesn’t charge for unknowns. See the ZeroBounce profile.
• Hunter: finds, verifies and sends, with a free plan of 50 credits a month and verifications at half a credit. See the Hunter profile.
• Snov.io: finder, verifier and sender from $39 a month. See the Snov.io profile.
• Reachkit (our product): for cold outreach lists, which Kickbox’s terms rule out, Reachkit checks CSV imports by default (1 credit per 10 addresses), holds catch-all and unverifiable ones for your call, and pauses campaigns at 5% bounces. It won’t check signup forms.