Allegrow vs ZeroBounce (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 ZeroBounce if

• Fits if you want list cleaning, warm-up and DMARC for one domain on one bill
• Works for developers who want an API with SDKs in 16 languages, or checks from an iPhone or iPad

Look elsewhere if

• Pricey if you only need a list cleaned, at about $129 for 10,000 checks
• Tight if you send from several domains, as ONE watches DMARC for just one
• Watch out: unused tests, monitors and warm-up seeds on ONE don't roll over, only verification credits do
• Watch out: the free 100 checks a month need a business email domain at sign-up
• Not for you if you're on Android or a desktop, as the only app is for iPhone and iPad

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.

ZeroBounce

• Warm-up and DMARC monitoring come only with ZeroBounce ONE, and it covers a single DMARC domain.
• Unused tests, monitors, searches and warm-up seeds on ONE do not roll over; only verification credits do.
• The FAQ says credits never expire with an active ONE subscription; otherwise expiry rules may apply depending on when they were bought.
• The free credits need a business or premium email domain at sign-up.

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.

ZeroBounce

Email validation

Checks lists by file upload or real-time API and flags invalid, catch-all, disposable, role-based, abuse and spam-trap addresses. Unknown results and duplicates are free.

AI scoring

An AI model scores each address for quality at one extra credit, which helps decide whether to send to catch-all and other uncertain addresses.

Email Finder

Finds a person's work address from a name and company domain, at 20 credits per successful search; unknown results cost nothing.

Warm-up and placement tests

ZeroBounce ONE includes warm-up through a seed network, inbox placement tests against 20+ providers and email server tests.

Blacklist and DMARC monitoring

Monitors IPs and domains on blacklists and gathers daily DMARC reports for one domain on the ONE plan.

API, SDKs and iOS app

A validation and scoring API with SDKs in 16 languages, an MCP server, and an iOS app for checking lists from an iPhone or iPad.

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.

ZeroBounce

• Freemium$0

  100 verification credits that refill each month, one inbox placement test, one server test and one blacklist monitor.

• Pay-As-You-Go$39

  one-time for 2,000 credits

  The minimum purchase. Per-credit rates fall with volume: about $129 for 10,000 ($0.0129 each) and $0.0032 each at 1 million.

• ZeroBounce ONE$79

  per month for 10,000 credits, billed annually ($99 monthly)

  Credits roll over, plus 250 warm-up seeds, 100 inbox tests, 100 server tests, 10 blacklist monitors, 1 DMARC domain and 15% off extra credits.

• EnterpriseCustom

  Purchases or subscriptions of more than 1 million credits, with onboarding and training.

Allegrow

No public discounts listed.

ZeroBounce

• Annual discount

  20% off ZeroBounce ONE billed annually

  ZeroBounce ONE costs $79 a month when paid annually in one charge, against $99 billed monthly.