Gigasheet vs Apollo.io: Right Comparison? (2026)

Gigasheet vs Apollo.io: Are You Comparing the Right Tools?

Gigasheet runs Apollo's People Enrichment API (/v1/people/match) inside its spreadsheet UI. So when you search Gigasheet vs Apollo.io, you're comparing a spreadsheet layer to the database it calls. The real question isn't which one to pick - it's whether you need a B2B contact database, a big-data spreadsheet, or something else entirely.

30-Second Verdict

Use Apollo.io if you need a B2B contact database with built-in sequencing and outreach. It's the all-in-one prospecting engine for SDR and AE teams.

Use Gigasheet if you're wrangling massive CSVs - up to 25 million rows per sheet on Premium, or up to 1 billion rows on MRF Explorer - and want a no-code interface to run enrichments from multiple providers. Healthcare price transparency teams are the sweet spot now.

Skip both if your core problem is data accuracy. Neither tool gives you a purpose-built, proprietary verification layer end-to-end. When you use Gigasheet's Apollo template, Gigasheet returns whatever Apollo returns - bounce rates and all.

What Each Tool Does in 2026

Apollo.io

Apollo is a B2B sales intelligence platform with 260M+ contacts and built-in email sequencing, enrichment, and basic deal management. It's the default starting point for SMB and mid-market outbound teams who want prospecting, data, and engagement in one place. G2 gives it a 4.7/5 from over 9,500 reviews. Users consistently praise the filters, lead gen workflow, and time savings. The recurring complaint? Data accuracy, especially outside North America.

Apollo's data also struggles with local business owners - a thread in r/gtmengineering describes getting generic info@ emails and front desk numbers instead of decision-maker contacts. We've seen this firsthand when testing Apollo for agency clients targeting SMB verticals.

Gigasheet

Here's where it gets interesting. Gigasheet started as a big-data spreadsheet for handling files too large for Excel or Google Sheets. But its product positioning has pivoted hard toward healthcare price transparency. G2 now describes it as "an analytics platform purpose-built for healthcare market intelligence," and the healthcare-focused MRF Explorer tier starts at $295/user/mo billed annually with support for 1 billion rows per sheet. It carries a 4.9/5 G2 rating, but from just 23 reviews - mostly healthcare and analytics users, not sales teams.

Gigasheet still supports enrichment through a credit system and third-party APIs, including Apollo's. Some enrichments run through "Keyless Entry" partners, so you don't need a separate API registration. But sales teams aren't the primary audience anymore. Think of it as a no-code workbench that can call any REST API, not a prospecting tool.

Feature and Pricing Comparison

On Gigasheet's $95/mo Premium plan, the effective cost is about $0.95 per enrichment credit before you factor in any underlying API costs from whatever provider you're calling.

Apollo's credit system is notoriously confusing. Credits expire monthly, phone numbers eat 5 credits each, and overages run $0.20/credit with a 250-credit minimum purchase. Apollo also runs parallel credit systems: legacy accounts and migrated accounts can see different limits on the same plan tier, which makes cost forecasting a headache. We've seen teams blow through credits mid-month and scramble to buy overages at a premium just to keep sequences running.

When to Use Each Tool

Building outbound pipeline? Use Apollo. You need the contact database, the filters, and the sequencing. Gigasheet doesn't have any of that.

If you're still building your outbound motion, start with the fundamentals: sales prospecting techniques and a clean lead workflow.

Sitting on massive datasets that need cleaning and enrichment? Gigasheet. If you're working with huge files, merging data from multiple providers, or running healthcare price transparency analytics through MRF Explorer, it handles scale that Apollo's UI never will.

Want Apollo's data but need large-file handling? Use both. Gigasheet can call Apollo's API directly, and Apollo's bulk match endpoint caps requests at 10 records per call. You get Apollo's data in a spreadsheet that won't choke on millions of rows. Clay handles similar multi-source enrichment at $167/mo, but Gigasheet's edge is raw file scale rather than multi-step orchestration. (If you're comparing workflows like this, see our breakdown of Clay list building.)

The Missing Piece: Data Verification

Neither Apollo nor Gigasheet gives you a dedicated, proprietary verification layer.

Apollo's enrichment flow can rely on third-party vendors via waterfall enrichment, and 15-25% bounce rates are a common critique - especially outside North America. Gigasheet doesn't add its own verification at all; it passes through whatever the enrichment API returns, bad emails included.

Let's be honest: if you're sending cold outbound with unverified data, you're gambling with your domain reputation every single day. (If you want the mechanics, read our guide on how to improve sender reputation.)

The workflow that actually works: enrich your contacts through Apollo (directly or via Gigasheet), then run the output through Prospeo's bulk verification before you hit send. Prospeo's proprietary 5-step verification catches invalid emails, spam traps, and honeypots that other tools miss - delivering 98% email accuracy across 143M+ verified emails on a 7-day data refresh cycle. At roughly $0.01 per email, it's cheap insurance against torching your sender reputation. Snyk cut bounce rates from 35-40% to under 5% after adding a verification step like this, and their AE-sourced pipeline jumped 180%.

If you're evaluating verification vendors, compare options in our roundup of Bouncer alternatives.

Bottom Line

SDR/AE teams running outbound - Apollo. It's the database, the sequencer, and the workflow engine in one platform. Most outbound teams should start here. If you're pairing it with a CRM, use a solid contact management software foundation.

Data and analytics teams with massive files - Gigasheet. Especially healthcare price transparency teams. Gigasheet's MRF Explorer starts at $295/user/mo billed annually for billion-row datasets, and that's clearly where the product is heading.

Look, Gigasheet vs Apollo.io is a comparison that doesn't really make sense once you understand what each tool does. They solve different problems, and one literally runs inside the other. If you're running lean outbound on sub-$10k deals, you probably don't need Gigasheet at all - just Apollo for sourcing and a verification layer to clean the output. Pick the layer you're missing, not the tool that sounds most impressive.

FAQ

Can Gigasheet replace Apollo.io?

No. Gigasheet is a spreadsheet that can call Apollo's API - it doesn't have its own contact database. You still need a data provider like Apollo to source contacts and a verification tool to clean them before outreach.

Is Gigasheet still a sales tool?

Less so every quarter. Its positioning has shifted toward healthcare price transparency, and G2 now categorizes it under healthcare market intelligence. It still supports enrichment via third-party APIs, but sales teams aren't the target anymore.

How do I avoid bounces from Apollo enrichment data?

Run enriched contacts through a dedicated verification tool before outreach. Prospeo's 5-step verification catches spam traps and invalid addresses in minutes at roughly $0.01 per email. Teams that skip this step routinely see 15-25% bounce rates that damage sender reputation for months.

What's a better Apollo alternative for verified data?

Prospeo combines a 300M+ contact database with proprietary email verification and 125M+ verified mobile numbers. Every email goes through 5-step verification on a 7-day refresh cycle, so you get sourcing and accuracy in one platform - starting with a free tier of 75 emails/month.