7 Best Interseller Alternatives for B2B Enrichment in 2026

SyncGTM is a B2B enrichment and outreach platform best suited for sales teams that need high coverage and automated pipeline workflows, offering waterfall enrichment across 50+ providers from $49/mo with a free tier.

Where Interseller runs a single engine, SyncGTM runs a waterfall — querying provider after provider in sequence until a verified result lands, and only charging on success. That pushes coverage from the single-source 40–60% rate to 80%+ across most ICPs, the exact gap Interseller struggles with outside US tech.

The data depth gap is sharp. Interseller returns a verified email and a basic contact record. SyncGTM returns 76+ fields per record: verified email, mobile direct dial, company firmographics, technographics, funding stage, headcount, LinkedIn URL, job title history, and buying signals like recent funding rounds and job postings.

SyncGTM's AI agents handle the outreach automation Interseller built its name on — but tied to live data. They trigger enrichment on CRM events, fire outreach when buying signals fire, and route leads automatically. No Greenhouse ATS required, and no per-seat lock-in. See the full plan breakdown on the pricing page.

Apollo.io is an all-in-one sales intelligence platform best suited for SMB and mid-market teams that want prospecting and sequencing in one tool, offering a 275M+ contact database with built-in outreach from $49/mo.

Apollo is the closest direct replacement for what Interseller actually did: find contacts, then run sequences. But it does both at far greater scale. The 275M+ contact database dwarfs Interseller's lookup pool, and the free tier — 10,000 email credits per month — is the most generous on this list.

The tradeoff is depth versus simplicity. Apollo has more buttons, more limits to learn, and single-source data with no waterfall fallback. Phone credits cost far more than email credits. But for teams that want everything in one platform without a Greenhouse subscription, Apollo is the obvious move.

For a fuller breakdown, see our Apollo.io review.

Lemlist is a sales engagement platform best suited for teams whose priority is the outreach side of Interseller, offering multichannel sequences and a 600M+ lead database from $39/user/mo.

Lemlist matches Interseller's strongest feature — personalized sequencing — and extends it to LinkedIn. Email and LinkedIn steps run in one sequence, built-in warm-up protects deliverability, and the enrichment credits cover the contact-finding Interseller bundled.

The tradeoff is that Lemlist is outreach-first, not a deep enrichment engine. Its database is large but single-source, so it lacks the waterfall fallback of SyncGTM. For pure multichannel cold outreach, though, Lemlist is the cleanest Interseller replacement.

For more sequencing options, see our roundup of the best Instantly alternatives.

Explorium.ai is a B2B data platform best suited for teams building AI SDRs or signal-based outbound, covering 146M+ companies and 767M+ professional profiles from $29.99 per credit package with a 100-credit free trial.

Explorium fixes the other half of Interseller's problem: context. Interseller returned a contact and stopped. Explorium's company enrichment adds firmographics, technographics, funding data, and workforce trends, and its event feed flags funding rounds, job changes, and new hiring as they happen, so outreach can start from a real reason to reach out.

There is no sequencer, so Explorium sits in front of an outreach tool rather than replacing Interseller's campaigns. Explorium lists lemlist and Outreach among its partners and customers, and it connects to Salesforce and HubSpot. Access runs through one REST API, a hosted MCP server, or the no-code Vibe Prospecting app, which builds lists from plain-English prompts.

For a look at how single-database tools compare with multi-provider waterfalls, see our best waterfall contact providers guide.

Snov.io is a budget-friendly sales toolkit best suited for small teams that want finding, verification, and outreach bundled, offering a free tier and paid plans from $39/mo.

Snov.io is the closest cheap match for Interseller's finder-plus-sequencer combo. It finds emails, verifies them in the same tool, and runs drip campaigns from a connected mailbox — the exact 1:1 sequencing motion Interseller pioneered, at a fraction of the Greenhouse price.

The tradeoff is depth. Snov.io is single-source, its firmographics are thin, and there are no buying signals or AI workflow triggers. For solo founders and small SDR teams on a tight budget, though, it covers the core Interseller use case affordably.

For an in-depth look, see our Snov.io review.

Hunter.io is a domain-based email finding tool best suited for teams whose outreach motion is email-only, offering 25 free searches per month and paid plans from $34/mo (annual).

Hunter's domain search is its strongest feature. Enter a company domain and Hunter returns every email it has indexed for that domain, plus the pattern (e.g., {first}.{last}@company.com). Where Interseller worked from a profile, Hunter works from a domain — useful when you know the company but not the person.

The tradeoff: Hunter is email-only and doesn't return phone numbers, and firmographics are thin with no waterfall fallback. For pure email prospecting on a tight budget, it's the cheapest reliable entry point, and it carries thousands of G2 reviews — far more recent signal than Interseller's aging profile.

For a fuller side-by-side, see our Hunter.io alternatives roundup and our Hunter.io review.

ContactOut is a LinkedIn-based contact finder best suited for recruiters and teams that need personal email coverage, offering work and personal emails plus phones from $99/mo with a limited free tier.

ContactOut is the most natural fit for Interseller's recruiting heritage. It surfaces personal email addresses — the gmail and outlook addresses candidates actually read — which most B2B finders miss, and it carries deep coverage across LinkedIn and Recruiter views.

The tradeoff is that ContactOut is finder-first with lighter outreach than Interseller's sequencer, and it's single-source. For recruiting and people-search use cases that need personal-email reach, though, it's the standout pick here.

For more LinkedIn-finder options, see our ContactOut alternatives roundup.