Interseller vs Apollo.io: Honest Comparison (2026)

Interseller vs Apollo.io: One Is in Maintenance Mode

If you're weighing Interseller against Apollo.io in 2026, the answer is straightforward: one product is actively developed, the other is running on fumes. Interseller was built for recruiters who need candidate emails and outreach sequences synced to an ATS. Apollo.io is a full sales intelligence and engagement platform with a 275M+ contact database. Greenhouse acquired Interseller in October 2021, and since then the product has been slowly winding down - fewer updates, a gutted support team, and an FAQ that reads more like a hospice notice than a roadmap.

This comparison still surfaces because recruiters who adopted Interseller years ago need to decide whether to stay or switch, and sales teams occasionally stumble across it while evaluating outreach tools.

30-Second Verdict

Use Apollo if you're a sales team that needs a database, sequencing, and a free tier to get started. It's not close.

Use Interseller if you're a recruiter already embedded in the tool and your ATS integration still works. But you're riding a product with no dedicated support team, and minor bugs won't get fixed.

Feature Comparison

The G2 review gap - 210 vs. 9,500+ - tells you everything about momentum. Interseller's G2 profile hasn't seen meaningful activity in over a year.

Is Interseller Still Active?

Technically, yes. Practically, it's on life support.

Interseller transitioned to a self-service support model by the end of 2024. No dedicated support team remains. Their own FAQ states explicitly that "minor bugs will not be addressed" - they'll only monitor for major outages. When a vendor tells you they won't fix minor bugs, that's maintenance mode, not a roadmap.

The official FAQ answers "Is Interseller ending?" with a non-committal "we do not have plans to end Interseller in the near future." Read that carefully. It doesn't say "we're investing in Interseller's future." It says "we haven't pulled the plug yet."

Woodpecker's blog claims you can't buy Interseller without a Greenhouse contract anymore. That's outdated - the official help center confirms self-serve subscriptions at $200/seat remain available. But the fact that conflicting information floats around uncorrected tells you how much attention this product is getting.

What users say: TrustRadius reviewers mention difficulty updating profile information after syncing and frustration with paying for overlapping CRM functionality. We've seen Interseller users keep it running for months without issues - but only when their ATS sync never breaks. The moment something goes wrong, there's nobody to call.

Migrating Off Interseller

If you're moving away, plan for three things. First, export your contact lists and sequence data - there's no automated migration path to Apollo or any other tool. Second, rebuild your email sequences from scratch, because Interseller's templates won't transfer. Third, re-map your ATS integration entirely. Moving to Apollo means connecting to a CRM instead, which forces you to rethink your workflow from recruiting-first to sales-first - a bigger shift than most teams anticipate when they start the migration.

If you're rebuilding your outbound motion anyway, it’s worth revisiting your sales prospecting process and your sequence management standards before you port anything over.

Apollo.io: What You Actually Get

Apollo is the clear winner for anyone in sales. The database covers 275M+ contacts, the free tier gives you email credits to test the waters, and the platform bundles prospecting and sequencing into one tool.

Here's the thing about Apollo's credit system, though: it's deceptively complex. Accessing a contact's email costs 1 credit, a phone number costs 5, and enrichment can use up to 6 credits per record. We've watched teams blow through their monthly allocation in the first week because they didn't model usage upfront. If you're running high-volume outbound, do the math before you commit to a plan.

Vendr's data across 85 purchases shows a median annual spend of roughly $15,448/year, which is real money once you scale past the free tier. And if you care about deliverability - and you should - Apollo email accuracy sits around 79%. That means roughly 1 in 5 emails bounce, so many teams run a second-pass verifier before high-volume sends.

Pricing Breakdown

As of April 2024, Interseller stopped offering custom or legacy plans to new customers. All new users land on the Recruiter plan: $200/seat/month with 250 lookups per user. No discounts, no custom contracts.

Apollo's pricing is more flexible but also more confusing. The gap between annual and monthly billing runs about 20% on Basic and Professional, and the credit math genuinely requires a spreadsheet to model properly. A single Apollo seat at $49/month annual gives you dramatically more than Interseller's $200/seat - unless your workflow is entirely ATS-centric and you can't justify rebuilding sequences.

Let's be honest: if your average deal size sits below $10K, you probably don't need Apollo's full platform either. Most teams comparing these two tools actually need accurate contact data they can push into whatever outreach tool they already use - not another platform to manage.

A Simpler Path: Verified Emails Without the Platform

If you landed on this comparison because you need verified B2B emails - not a full recruiting outreach tool, not a sales engagement platform - Prospeo is the simpler path.

Prospeo covers 300M+ professional profiles with 143M+ verified emails and 125M+ verified mobile numbers. Email accuracy sits at 98% - compared to Apollo's 79% - with a 7-day data refresh cycle versus the roughly 6-week industry average. The platform is GDPR compliant, uses proprietary email-finding infrastructure rather than relying on third-party providers, and offers 30+ search filters including buyer intent data across 15,000 topics.

The free tier gives you 75 verified emails and 100 Chrome extension credits per month. Paid plans scale to roughly $0.01 per email with no contracts and no annual commitments. You only pay for verified results - a fundamentally different model than Apollo's credit-burn system where you spend credits whether the data is accurate or not. Native integrations with Salesforce, HubSpot, Lemlist, Instantly, and Clay mean you plug it into your existing stack instead of replacing it.

If you're comparing data vendors, start with a shortlist of data enrichment services and sales prospecting databases so you’re not forced into an all-in-one platform.

Who Should Switch - and to What

Recruiter on Interseller whose ATS sync still works: Stay for now, but start evaluating alternatives. Export your data monthly as a backup. The moment a sync breaks, you'll have no support to fix it.

Sales team evaluating both for the first time: Apollo, without question. The free tier alone gives you more than Interseller's $200/month plan. Start there and upgrade only when you hit credit limits.

Anyone who just needs accurate emails and phones: Skip both platforms entirely. A dedicated data tool paired with your existing outreach software will cost less and deliver cleaner data. We've watched too many teams pay for engagement platforms they use at 20% capacity just to access the contact database underneath.

If you’re building a lightweight stack, consider pairing a data tool with free lead generation tools and a simple CRM from these examples of a CRM.

FAQ

Is Interseller being shut down?

Not officially. Interseller's own FAQ says they "do not have plans to end Interseller in the near future," but the support team is gone and minor bugs won't be fixed. The G2 profile hasn't seen activity in over a year. Treat it as maintenance-mode software - usable today, risky for new rollouts.

Can you buy Interseller without Greenhouse?

Yes. Despite third-party blogs claiming otherwise, the official Interseller help center confirms self-serve subscriptions at $200/seat/month remain available without a Greenhouse contract.

How does Apollo.io's email accuracy compare?

Apollo's email accuracy sits around 79%, which means roughly 1 in 5 emails bounce. Many outbound teams layer a dedicated verification tool on top to clean their lists before sending. Prospeo's 98% accuracy rate and 5-step verification process eliminate that extra step entirely.