Interseller vs Prospeo: Which Data Tool Wins in 2026?
Interseller charges $200/user/month for 250 email lookups - that's $0.80 per lookup, with no dedicated support team behind it. If you're comparing Interseller vs Prospeo, the math here isn't subtle: 98% email accuracy, 300M+ profiles, and roughly $0.01 per email on the Prospeo side.
30-Second Verdict
Prospeo wins decisively. Three reasons:
- Accuracy: 98% verified emails vs. inconsistent accuracy flagged on G2
- Mobile numbers: 125M+ verified mobiles - Interseller is email-only
- Cost per lookup: ~$0.01/email vs. $0.80/lookup
The only scenario where Interseller still makes sense is if you're deeply embedded in Greenhouse's ATS and need native sequencing. For everyone else, it's not close.
What Is Interseller?
Interseller is a recruiting-focused email finder and sequencing tool that Greenhouse acquired in October 2021. Users consistently praised its ease of use and sequencing automation - the problem isn't the product's core design. It's the total lack of investment since the acquisition.
By the end of 2024, Interseller transitioned to a self-service support model with no dedicated support team. Minor bugs won't get fixed. Greenhouse monitors major outages only. The Recruiter plan costs $200/user/month for just 250 lookups. Recruiters on Reddit recall paying around $100/month for unlimited drip campaigns - the current plan is a steep downgrade in value. One specific pain point we've seen mentioned repeatedly: users can't write comments or label candidates based on responses, forcing a clunky "DO NOT CONTACT" sequence workaround instead of proper tagging.
Here's the thing: Interseller isn't a bad product. It's an abandoned one. If Greenhouse had actually invested in it, this would be a real comparison. They didn't.
Interseller gives you 250 lookups for $200/month with no mobile numbers and no support team. Prospeo's free tier alone delivers 75 verified emails - nearly a third of that - at zero cost. Paid plans drop to ~$0.01/email across 300M+ profiles with 125M+ verified mobiles.
Stop paying $0.80 per lookup for data nobody's maintaining.
Head-to-Head Feature Comparison
| Feature | Interseller | Prospeo | Winner |
|---|---|---|---|
| Database size | Not published | 300M+ profiles | Prospeo |
| Email accuracy | Inconsistent | 98% verified | Prospeo |
| Mobile numbers | None | 125M+ verified | Prospeo |
| Data refresh | Not published | Every 7 days | Prospeo |
| Pricing | $200/user/mo (250 lookups) | Free tier + ~$0.01/email | Prospeo |
| Cost per lookup | ~$0.80 | ~$0.01 | Prospeo |
| Support | Self-service, no team | Active support | Prospeo |
| Free tier | None | 75 emails/month | Prospeo |
| ATS integration | Greenhouse-native | Salesforce, HubSpot, Lemlist, + more | Interseller (if you live in Greenhouse) |
Interseller's single edge is native Greenhouse integration. On everything else - data depth, accuracy, mobile coverage, pricing, support, product momentum - it isn't competitive.
When Each Tool Fits
Stick with Interseller if you're a recruiting team running Greenhouse as your core ATS, you need sequencing that syncs natively to candidate records, and you accept $0.80 per lookup with no support safety net. Skip it if you need mobile numbers at any price - they simply don't offer them.
Go with Prospeo if you need verified emails and direct dials at scale. The email finder runs a proprietary 5-step verification process with no third-party email providers in the chain. If you want the underlying mechanics, see our guide on how to verify an email address. The industry average data refresh is around six weeks; a 7-day cycle keeps bounce rates from creeping up on you (and helps prevent email deliverability issues). Meritt, a customer, cut bounce rates from 35% to under 4% after switching - that's not a marginal improvement, it's a different category of data quality entirely. For outbound teams burning through credits, the free tier alone gives you 75 verified emails per month, which is nearly a third of what Interseller's $200/month plan provides.
The Verdict
Let's be honest - Interseller is a recruiting tool coasting on legacy momentum inside Greenhouse, with no support team and no public product roadmap. We've tested both platforms, and the weekly data refresh on Prospeo produces noticeably better deliverability than tools running monthly or quarterly cycles. If you're scaling cold email, that refresh cadence matters. When you're comparing Interseller vs Prospeo on any metric beyond Greenhouse ATS integration, the decision isn't complicated.
Meritt cut bounce rates from 35% to under 4% after switching to Prospeo's 7-day data refresh cycle. That's not a tweak - it's the difference between burning your domain and booking meetings. 98% email accuracy, 125M+ verified mobiles, and a proprietary verification pipeline that doesn't depend on third-party providers.
Replace abandoned tools with data that's refreshed every 7 days.
FAQ
Is Interseller still active in 2026?
Technically yes, but barely. It transitioned to a fully self-service model by the end of 2024 - no dedicated support, no bug fixes. Greenhouse monitors major outages only, with no public roadmap for new features.
Can you buy Interseller without Greenhouse?
Interseller is Greenhouse-owned and priced at $200/user/month. Some third-party reviews say it's only available through Greenhouse; the help center describes a standalone subscription. Availability depends on whether you're buying standalone or through the Greenhouse ecosystem.
How does the cost per lookup compare?
Interseller charges ~$0.80 per lookup ($200 / 250). Prospeo's free tier gives you 75 emails/month at zero cost. On paid plans, Prospeo averages ~$0.01 per email, making it roughly 80x cheaper per lookup.
What's a good free alternative to Interseller?
Prospeo's free tier (75 verified emails + 100 Chrome extension credits/month) covers more lookups than Interseller's $200/month plan provides. For teams needing mobile numbers alongside emails, it's the strongest free option - Interseller has no free tier and no mobile data at any price.