Endole vs Apollo.io: They're Not Even Competitors
Endole and Apollo.io keep showing up in the same comparison lists, but they're not in the same category. One is a UK company intelligence platform. The other is a global sales engagement tool. The overlap between them is almost zero - Endole handles credit checks and company research, while Apollo.io builds lists and runs outbound sequences. Comparing them is like comparing Bloomberg Terminal to Mailchimp: both involve data, but the similarity ends there.
We've tested both platforms. Here's which one you actually need.
30-Second Verdict
- Endole: Pick it if you need UK company intelligence - credit risk, director lookups, due diligence, compliance. It's not a sales engagement tool.
- Apollo.io: Pick it if you need an all-in-one outbound platform - contact database, email sequences, dialer. Expect roughly 65% data accuracy and real costs 2-3x the sticker price.
What Is Endole?
Endole wraps UK Companies House data in a faster, richer interface and layers on credit scoring, director intelligence, group structures, and monitoring alerts. Its database covers millions of UK company profiles and director records. The free government API gives you filings and officer lists, but Endole adds list-building filters, risk scoring, financial trend charts, and real-time email alerts on top.
Pricing sits at £39/month, or £25/month billed annually. G2 users rate it 4.6/5 - though that's from just 5 reviews. Endole Explorer has zero Capterra reviews, which tells you something about its market footprint. Trustpilot paints a rougher picture at 2.7/5 across 109 reviews, with recurring complaints about cancellation friction and unresponsive support.
Here's the thing: Endole is genuinely faster and more useful than raw Companies House data for UK company due diligence, credit checks, KYC, or building B2B lists filtered by UK-specific criteria. But it's not an email-finding or email-verification product, it's focused almost entirely on UK entities with limited US coverage, and it has nothing resembling a sales engagement workflow. If you need sequences, dialing, or global prospecting, you're in the wrong tool.
What Is Apollo.io?
Let's start with cost reality, because Apollo's sticker price is misleading. The free tier exists, and paid plans run $49-$119/user/month on annual billing (or $59-$149 monthly). But credits expire every month, phone credits cost roughly 8x email credits, and overages hit $0.20/credit. Heavy outbound teams should budget $150-$400/user/month once actual usage kicks in.
For that money, you get the Swiss Army knife of outbound sales: a database of 210M+ contacts across 35M+ companies, built-in email sequencing, a dialer, and enrichment/API workflows all in one platform. Capterra rates it 4.5/5 across 384 reviews, and it's the obvious starting point for SMB teams that want to prospect and engage without stitching together five different tools.
The bigger issue is data accuracy. On r/SaaS, users consistently report around 65% of Apollo contacts being usable. One practitioner broke down the math: building and verifying 500 contacts on Apollo took roughly 6 hours, compared to 2.5 hours using a waterfall enrichment approach. Reddit threads also flag sequencing delays where emails backlog and reschedule to the next day despite configured daily limits. Apollo's EMEA data is weaker than its US coverage - worth knowing if you're prospecting in the UK.
Apollo is still the best all-in-one outbound platform for teams under 10 reps. But "all-in-one" means you're accepting mediocre data accuracy as the trade-off for convenience. If your average deal size clears $15k, that trade-off stops making sense fast. Every bounced email is a wasted shot at a high-value account.
Apollo's 65% accuracy means one in three emails bounces - and every bounce chips away at your sender reputation. Prospeo's 300M+ profiles deliver 98% email accuracy on a 7-day refresh cycle, at roughly $0.01 per email. No sequencing bloat, no credit games - just verified contact data that actually connects.
Stop gambling your domain reputation on unverified data.
Side-by-Side Comparison
| Endole | Apollo.io | Prospeo | |
|---|---|---|---|
| Starting price | £39/mo (£25/mo annually) | Free tier; paid from $49/mo | Free (75 emails/mo) |
| Database size | Millions of UK companies | 210M+ contacts | 300M+ profiles |
| Geographic focus | UK-first | Global (US-strongest) | Global |
| Primary use case | Company intel / risk | Outbound sales | Verified contact data |
| Email accuracy | N/A (not an email tool) | ~65% | 98% |
| Review ratings | G2 4.6/5 (5 reviews) | Capterra 4.5/5 (384 reviews) | G2 4.5/5 |
| Compliance | UK Companies House data | DNC checking (US + UK) | GDPR compliant |
The category mismatch is obvious in a table. Endole doesn't even have an email accuracy metric because it isn't an email verification tool. Apollo has one, but it's nothing to celebrate.
Which Tool Fits Your Workflow?
For UK company due diligence and credit risk, Endole is the right tool. Nothing else here replaces its Companies House overlay, credit scoring, and director intelligence for UK entities. Skip it for anything outside the UK or anything involving outbound sales execution.
Teams wanting an all-in-one outbound platform should look at Apollo. Database, sequences, and dialer in a single login - that's genuinely valuable for small sales teams getting started with outbound. Just know the data accuracy gap means you'll need a verification layer, and real costs will exceed published pricing by a wide margin once you're running campaigns at any kind of volume.
If verified contact data is the priority, neither tool delivers cleanly out of the box. Endole isn't built for outreach data at all, and Apollo provides contacts at roughly 65% accuracy, which means you're gambling with your sender reputation on every campaign. In our experience, this is where the category mismatch trips up most buyers - they search for a comparison between these two platforms when what they actually need is accurate contact data, and neither tool is built for that specific problem.
The Verified Contact Data Gap
This is the gap both tools leave open: getting emails and phone numbers that actually work. Prospeo's database covers 300M+ professional profiles globally with 98% email accuracy and 125M+ verified mobile numbers, all refreshed on a 7-day cycle. At roughly $0.01 per email with a free tier of 75 emails/month, there's no contract or sales call required - you can test it against your existing data in about ten minutes and see the difference yourself.
Endole covers UK company intel. Apollo covers outbound sequences. Neither solves the core problem: getting emails and direct dials that work. Prospeo fills that gap with 143M+ verified emails and 125M+ verified mobiles globally - all refreshable weekly, not monthly.
75 free emails. Test it against your Apollo data in ten minutes.
FAQ
Does Endole offer a free trial?
No free plan is publicly listed. Pricing starts at £39/month (or £25/month billed annually) with no contracts. You can cancel anytime, though Trustpilot reviewers frequently report friction with the cancellation process - read the terms before committing.
Is Apollo.io accurate enough for cold outreach?
Users report roughly 65% accuracy, meaning about one in three contacts won't be usable. For cold email at scale, that's a domain reputation risk. Budget for a verification layer or expect elevated bounce rates that'll hurt your deliverability over time.
Can I use Endole for prospecting outside the UK?
Endole is built primarily for UK entities, and G2 reviewers flag limited US coverage as a gap. For global prospecting, you need Apollo, or another dedicated data platform with international reach.
What's the best tool for verified B2B emails?
Prospeo leads on email accuracy at 98%, backed by a proprietary 5-step verification process and 7-day data refresh cycle. Apollo sits around 65%, and Endole doesn't offer email verification at all. For outbound teams where deliverability matters, it's the strongest standalone option we've found.