- You want spam testing, inbox placement, client previews and AI eye-tracking heatmaps in one plan. ZeroBounce has no rendering previews and no heatmaps.
- You want to test deliverability without committing to a verification suite: Unspam's paid plans run $9 to $29/mo, while ZeroBounce's bundled deliverability tools sit on its ONE plan, listed at $99/mo ($79/mo billed annually).
- You want a free tier that renews monthly: 10 spam tests, 10 previews, 10 heatmaps and 3 inbox placement tests, AI assistant included, no card. ZeroBounce's free tier is 100 verification credits a month.
- You want results in about 30 seconds and a 14-day no-questions-asked refund on every paid plan.
// Unspam vs ZeroBounce
A ZeroBounce alternative that adds client previews and AI heatmaps
ZeroBounce is a large-scale email verification service that bundles a deliverability suite (inbox placement, warmup, blacklist and DMARC monitoring) into its ONE plan, listed at $99/mo ($79/mo billed annually). Unspam covers spam testing and inbox placement too, then adds client previews, AI eye-tracking heatmaps and an AI assistant in one plan: paid from $9/mo, free tier with no card.
Compared from public pricing and product pages, June 2026.
Which one fits you?
- You verify email lists at scale. That is ZeroBounce's core product: 99% claimed accuracy, billions of addresses processed, with pay-as-you-go credits that never expire. Unspam includes verification but is not built for bulk list cleaning at that volume.
- You need automated inbox warmup. ZeroBounce ONE includes 250 warmup seeds a month, and Unspam does not warm up inboxes at all.
- You need continuous blacklist and DMARC monitoring. ZeroBounce scans your domain or IP every 8 hours on a paid subscription and collects DMARC reports on an ongoing basis; Unspam checks SPF, DKIM and DMARC per test only and does not monitor DMARC aggregate reports.
Unspam vs ZeroBounce, feature by feature.
Based on public product pages and documentation. Spotted something outdated? Tell us in the chat and we’ll fix it.
Feature
Unspam
ZeroBounce
Free plan or trial
Free plan, no card
Free: 100 verification credits/mo
First paid plan
$9/mo
$20 one-time (2,000 verification credits)
Spam score testing
Yes
Partialcontent + server tests, no dedicated spam score
Inbox placement tests
Yes
YesONE plan, 20+ providers
Client previews & screenshots
Yes
—No
AI attention heatmap
Yes
—No
Blacklist monitoring
Yes
Yesscans every 8 hours
SPF / DKIM / DMARC checks
Yes
Yes
AI fix recommendations
Yes
—No
Scheduled automatic tests
Yes
Yescontinuous monitoring
API access
YesWhite Label plan
Yes
Email verification
Yes
Yescore product, at scale
Automated inbox warmup
—No
YesONE plan, 250 seeds/mo
DMARC report monitoring
Partialchecked per test
YesONE plan, 1 domain
Deliverability consulting
Yesseparate service
Partialsupport and guides, not a managed service
What each one costs.
ZeroBounce sells verification by credit (pay-as-you-go or monthly subscription); its bundled deliverability tools (placement, warmup, blacklist, DMARC monitoring) live on the ONE plan. Prices and ONE inclusions verified June 2026. Credit counts and the monthly subscription entry price differ between ZeroBounce's own pages and third-party roundups.
- Free $0
10 spam tests, 10 previews, 10 heatmaps, 3 inbox placement tests per month. AI assistant included.
- Basic $9/mo
50 spam tests, 50 previews, 10 heatmaps, 10 inbox placement tests per month. Historical results.
- Business $19/mo
200 spam tests, 200 previews, 50 heatmaps, 50 inbox placement tests per month. Historical results.
- Agency from $29/mo
500 spam tests, 500 previews, 250 heatmaps, 250 inbox placement tests per month.
- White Label Custom
Spam tests, previews, heatmaps, and inbox tests sized to your contract. Custom API access.
- Free $0
100 email verification credits per month (resets monthly, business/premium domain required), no credit card. Free standalone deliverability checker tools.
- Pay-as-you-go (entry) $20 one-time for 2,000 credits
2,000 verification credits ($0.01/email). Larger packs lower the rate (about $0.009/email at 5,000, dropping further with volume). Credits never expire.
Entry pay-as-you-go price per ZeroBounce and usebouncer.com, June 2026. Some sources cite $18 for the 2,000-credit minimum ($0.009/email).
- Monthly verification subscription From $18/mo for 2,000 credits
Monthly email verification credits that replenish each month at a discount to pay-as-you-go. Higher tiers scale credit volume.
Entry monthly tier reported at $18/mo for 2,000 credits by third-party pricing roundups (mailfloss, usebouncer), June 2026; some roundups cite higher tiers. ZeroBounce surfaces ONE as its main subscription.
- ZeroBounce ONE $99/mo ($79/mo billed annually)
10,000 validation credits, 100 inbox placement tests, 250 warmup seeds, 10 blacklist monitors, 1 DMARC monitor domain, 100 email server tests, 10,000 email finder searches per month; 15% off additional credits.
Official ZeroBounce ONE page lists 10,000 credits at $99/mo. Some third-party roundups cite 25,000 credits; treat the official figure as current.
ZeroBounce pricing and feature information was collected from publicly available sources in June 2026 and may have changed since; it is provided for general comparison only and is not guaranteed to reflect current offers. Confirm current pricing on the vendor's website. ZeroBounce is a trademark of its respective owner. Unspam is not affiliated with or endorsed by ZeroBounce.
Why teams move from ZeroBounce to Unspam.
Previews and heatmaps in the same tool
ZeroBounce tells you whether an address is valid and where mail lands, but not how the email looks. It has no client rendering previews and no heatmaps. Unspam includes device previews and an AI eye-tracking heatmap on every plan, including the free one, so rendering and attention problems get caught before sending.
A lower entry point for testing
ZeroBounce's bundled deliverability tools (inbox placement, warmup, blacklist and DMARC monitoring) sit on the ONE plan, listed at $99/mo ($79/mo billed annually). If you mainly want to test campaigns before sending, Unspam's Basic plan is $9/mo and Business is $19/mo, each with a 14-day no-questions-asked refund.
An AI assistant that explains the fix
ZeroBounce returns verification results, an AI deliverability score and monitoring data, but no AI assistant to interpret them and recommend changes. Unspam includes an AI assistant on every plan, free tier included, and returns a result in about 30 seconds with a plain-language explanation of what to change.
// FAQ
Unspam vs ZeroBounce, answered.
Is Unspam a full replacement for ZeroBounce?
Not for high-volume verification. ZeroBounce's core product is email list verification at scale, and while Unspam includes an email verifier, it is not built for bulk list cleaning at that volume. ZeroBounce ONE also offers inbox warmup (250 seeds/mo) and continuous blacklist and DMARC monitoring, none of which Unspam does: Unspam has no warmup and checks SPF/DKIM/DMARC per test rather than monitoring reports. For pre-send testing, Unspam covers more, adding client previews and AI heatmaps that ZeroBounce lacks.
How does Unspam's pricing compare to ZeroBounce?
Different models. ZeroBounce sells verification by credit (pay-as-you-go from $20 for 2,000 credits, or monthly subscriptions), and bundles its deliverability suite into the ONE plan at $99/mo ($79/mo annually). Unspam is a flat subscription: a free plan, then paid plans from $9/mo to $29/mo, with a 14-day refund and 2 months free on annual billing.
What is the biggest functional difference?
ZeroBounce starts from verification and adds infrastructure tools: inbox placement across 20+ providers, warmup, and continuous blacklist and DMARC monitoring. Unspam starts from content testing: spam score, placement across 6+ providers (Gmail, Outlook, Yahoo, Zoho, ProtonMail, AOL), client previews, an AI eye-tracking heatmap and an AI assistant. Choose based on whether list hygiene and monitoring or design-side testing matters more.
How do the free tiers compare?
ZeroBounce's free tier is 100 verification credits per month (it resets monthly and requires a business or premium domain) plus free standalone checker tools. Unspam's free plan renews monthly with 10 spam tests, 10 previews, 10 heatmaps and 3 inbox placement tests, the AI assistant included, and no credit card required.
// see for yourself