Allegrow vs Kickbox (2026): which should you pick?

Pick Allegrow if

• Fits if you send B2B outreach and want catch-all addresses sorted out
• Works for sales teams that want list cleaning and mailbox health in one place

Look elsewhere if

• Pricey if you are one person: Starter is $99 a month for 5,000 contacts
• Pricey if you want native CRM links, as they sit on $1,340 a month billed annually
• Watch out: the trial leaves out integrations, API access and mailbox connection
• Watch out: extra users cost $40 a mailbox or user, and the Starter page gives no billing period

Pick Kickbox if

• Fits if you check sign-ups in real time and want a sandbox to test against
• Works for teams on Braze, Iterable or Klaviyo who want checks built in

Look elsewhere if

• Pricey if you clean big lists, as a million checks cost $2,999
• Not for you if you need warm-up, placement tests or DMARC tools as well
• Watch out: Threat Score costs one more credit when it finds a signal, which can double the price of an address
• Tight if you want a monthly plan, as only one-off packs are listed
• Tight if you want to try it on a real list, as only the first 100 checks are free

Allegrow

• The free trial excludes integrations, API access and mailbox connection.
• Starter has no native integrations and runs on credits; extra users cost $40 per mailbox or user.
• Unlimited verification and native integrations need Scale Plus Unlimited at $1,340 a month billed annually.
• The Starter price carries no billing period on the page.

Kickbox

• Only pay-as-you-go packs are listed; there is no monthly plan on the pricing page.
• Kickbox verifies addresses only; it has no warm-up, inbox placement testing or DMARC tools.
• Threat Score can double the cost per address when it finds a signal.

Allegrow

Catch-all verification

Gives catch-all addresses a Valid or Invalid status rather than leaving them as unknown.

Risk flags

Identifies spam traps, disposable addresses and inactive mailboxes, and detects each contact's primary email.

Domain health tracking

Starter connects 1 mailbox to track domain health and reputation, with automated positive email interactions.

DNS monitoring

Paid plans check SPF, DKIM and DMARC records every hour.

CRM and sales tool integrations

Scale Plus adds native integrations for HubSpot, Outreach and Salesloft and automated workflow rules.

Kickbox

List verification

Upload a list and Kickbox sorts each address by deliverability; the vendor says 100,000 addresses take about an hour.

Verification API

Checks addresses at sign-up in real time, with a sandbox mode for testing without spending credits and a free endpoint for spotting disposable domains.

Threat Score

Flags addresses linked to abuse, complaints or a poor sending reputation, for one extra credit only when a threat signal is found.

Native integrations

Verifies lists inside Mailchimp, Klaviyo, HubSpot, Braze, Iterable, SendGrid and others, with more through Zapier.

Deliverability consulting

Deliverability audits and consulting from Kickbox's own team are offered as a separate service beside verification.

Allegrow

• Starter$99

  per month for 5,000 contacts a month

  CSV list cleaning, API access on request, a Clay integration through an API key, and 1 connected mailbox for domain health tracking. Extra credits cost $8 per 1,000 contacts.

• Scale Plus Unlimited$1,340

  per month, billed annually

  Unlimited verification, native HubSpot, Outreach and Salesloft integrations, API capped at 1M requests a month, and a customer success manager. Sold by demo request.

• API PlanCustom

  Priced for millions of API requests a month, with unlimited API keys and custom sync and async speeds.

Kickbox

• Pay as you go$5

  one-time for 500 verifications

  Larger packs cost less per check: $10 for 1,000, $70 for 10,000, $500 for 100,000 and $2,999 for 1 million. Unknown results are refunded.

• CustomCustom

  Volume pricing for more than 1 million verifications, through sales.

Allegrow

No public discounts listed.

Kickbox

• Nonprofit

  15% off for nonprofits

  Kickbox gives nonprofit organizations a 15% discount on verification.