Seamless.AI has high bounce rates.
Sendburg gives you more at a lower price.
Seamless.AI is known for quantity over quality — high bounce rates and personal email addresses mixed in with work contacts. Sendburg delivers verified B2B emails with a credit refund guarantee, AI briefings, and buying signals Seamless.AI doesn't offer.
Why teams choose Sendburg over Seamless.AI
Verified accuracy vs quantity
Sendburg uses multi-source verification with credit refunds on any bounce. Seamless.AI is widely reported to have 20–30% bounce rates due to lower verification standards.
AI briefings included
Sendburg generates AI-synthesized account intelligence on every company. Seamless.AI has no equivalent feature — no AI briefings, no company intelligence layer.
No annual contract
Sendburg starts free with paid plans from $35/month on a monthly basis. Seamless.AI pushes users toward annual contracts at $147+/month with limited flexibility.
Sendburg vs Seamless.AI — feature comparison
| Capability | Sendburg | Seamless.AI |
|---|---|---|
| Free credits per month | 1,000 verified contacts | Limited (quality varies) |
| Email bounce rate | < 5% (credit refund guarantee) | 20–30% (widely reported) |
| AI account briefings | Included in all plans | Not available |
| Real-time buying signals | Included in all plans | Not available |
| Tech stack filter | 14,000+ tools tracked | Limited |
| Entry-level paid plan | $35/month | $147/month |
| Annual contract required | No — cancel any time | Yes — annual commitment |
| GDPR compliance | Full — lawful basis documented | Limited EU compliance |
Frequently asked questions
What is the difference between Sendburg and Seamless.AI?
Sendburg focuses on verified accuracy with multi-source validation and a credit refund guarantee, while Seamless.AI prioritizes data volume — often at the cost of email deliverability. Sendburg also includes AI account briefings and real-time buying signals that Seamless.AI does not offer.
Does Seamless.AI have a free plan?
Seamless.AI offers limited free access, but the quality and quantity of free contacts is significantly lower than Sendburg's 1,000 verified contacts per month.
Is Seamless.AI GDPR compliant?
Seamless.AI has limited EU coverage and GDPR compliance documentation. Sendburg is fully GDPR compliant with documented lawful basis under Article 6(1)(f) and a DPA available for enterprise customers.
Can I switch from Seamless.AI to Sendburg?
Yes. Sendburg's free plan lets you evaluate data quality and coverage before switching. Most teams find they can replicate their Seamless.AI searches in Sendburg with better deliverability.
Try Sendburg free.
No card. No contract.
1,000 verified contacts every month at no cost. Evaluate Sendburg against Seamless.AI with your own data before making any decision.