Altss vs Exellius: A Comparison That Shouldn't Exist
These two tools don't compete. Not even a little. Altss is an LP intelligence platform for fund managers chasing family office capital. Exellius is a B2B lead database for sales teams running outbound. The SERP for this query returns World of Warcraft memes and anime guild rosters, which tells you everything about how mismatched this pairing really is.
Still, you're here. Let's clarify what each does, who needs which, and what to actually use if you're building sales prospect lists.
30-Second Verdict
- Need LP and allocator contacts for fundraising? Altss is built for that.
What Is Altss?
Altss is a private-markets intelligence platform focused on LP-side contacts - family offices, allocators, and high-net-worth investors. The database covers 9,000+ verified family offices worldwide, with OSINT-powered signals like mandate tweaks and personnel changes surfaced with timestamps and provenance so you can see exactly what shifted and when. Contacts are re-verified within a 30-day cycle, and key fields can update in real time as new signals come in.
Pricing sits at $15,500/year for the full LP coverage license, billed annually. Multi-seat pricing is available via custom plans. That's reasonable when you consider PitchBook typically runs $20k-$50k+/year and Preqin lands in a similar range. For fund managers targeting family offices specifically, Altss comes in lower than most teams expect.
Here's the thing: if you're raising a fund and targeting family offices, Altss is a serious contender. If you're doing anything else - sales prospecting, cold outreach, lead gen - it's not for you. Wrong tool entirely.
What Is Exellius?
Exellius is a B2B lead database and email verification platform founded in 2021. The team is small - 26 employees per Tracxn, with annual revenue around $38K USD - but the database coverage claims are huge: 420M+ verified emails, 80M+ companies, across 190+ countries.
One thing caught our eye: Exellius claims "98% Accurate B2B Data" on its homepage, but its verification methodology page describes "over 95% accuracy." That gap matters when you're evaluating data quality. Their verification approach includes SMTP validation, activity tracking, and human QA with 5% random sampling.
Pricing is credit-based and transparent. Free tier at 75 credits/month, then $59/mo (Basic), $119/mo (Growth), and $199/mo (Professional). All plans include unlimited seats. The company shows ratings on its site including 4.4/5 on G2 and 4.6/5 on Capterra, though the Datarade profile sits at 4.9/5 based on just 3 reviews.
Let's be honest: a company generating ~$38K in annual revenue while claiming 420M+ verified emails deserves healthy skepticism. The product is real, but those scale claims outpace the company's maturity by a wide margin.
If you're here comparing B2B lead databases, data quality is what matters - not inflated database counts. Prospeo delivers 143M+ verified emails at 98% accuracy with a 7-day refresh cycle, not 5% random sampling. At ~$0.01 per email, you get enterprise-grade data without enterprise pricing or annual contracts.
Stop guessing which accuracy claim to believe. Test 75 emails free.
Side-by-Side Comparison
| Dimension | Altss | Exellius |
|---|---|---|
| Category | LP / fundraising intel | B2B lead database |
| Target user | Fund managers, IR teams | Sales teams, agencies |
| Database focus | Family offices, LPs | B2B contacts, all industries |
| Database size | 9,000+ family offices | 420M+ emails, 80M+ companies |
| Data refresh | Re-verified within 30 days | 48-hour email refresh, weekly company refresh |
| Pricing model | Annual subscription | Credit-based monthly |
| Price range | ~$15,500/year | $0-$199/month |
| Verification | OSINT + timestamps & provenance | SMTP + human QA (5% sampling) |
This table doesn't make sense as a comparison. These tools share zero feature overlap. One tracks allocator mandates; the other finds sales prospect emails. We've seen fund managers land on this query expecting a real head-to-head, and there just isn't one.
Which One Do You Need?
Use Altss if you're raising a fund and need verified LP contacts - family offices, allocators, institutional investors. It's cheaper than PitchBook and designed specifically for capital formation workflows. Nothing else on this page replaces it for that job.
Sales teams building outbound lists need a lead database, not an allocator intelligence platform. Altss doesn't have B2B professional contacts outside the LP ecosystem, so don't try to force it into a prospecting workflow.
Use a B2B lead database if you're running cold email campaigns, enrichment workflows, or any kind of outbound sales motion. That's where Exellius and tools like Prospeo live.
Better B2B Sales Data
If your actual need is B2B contact data for sales, the numbers make the decision straightforward.
Prospeo offers 143M+ verified emails at 98% accuracy, 125M+ verified mobile numbers with a 30% pickup rate, and a 7-day refresh cycle across 300M+ profiles. Compare that to Exellius's accuracy claims that range from 95%+ to 98% depending on which page you read, with verification that relies on 5% random sampling as part of QA. We've tested both approaches, and the difference shows up fast in bounce rates - especially at volume.
If you're trying to keep bounces down, it helps to track your email bounce rate and fix deliverability issues before scaling.
Beyond raw contact data, Prospeo brings 30+ search filters including buyer intent data via Bombora across 15,000 topics, technographics, and job change signals. Pricing starts free with 75 verified emails/month plus 100 Chrome extension credits/month, and paid plans run about $0.01 per verified email. No annual contracts, no sales calls required.
Sales teams need more than just emails - they need signals. Prospeo layers 30+ filters including buyer intent across 15,000 Bombora topics, technographics, and job change alerts on top of 300M+ profiles. Teams book 26% more meetings than ZoomInfo users because fresher data means fewer bounces and more live conversations.
Build prospect lists that actually convert - 75 free verified emails, no credit card.
FAQ
Are Altss and Exellius competitors?
No. Altss is an LP and fundraising intelligence platform for fund managers targeting family offices and allocators. Exellius is a B2B lead database for sales teams running outbound prospecting. They serve completely different markets with zero feature overlap. If someone told you these are alternatives to each other, they're wrong.
Is Exellius good for finding investor contacts?
It isn't. Exellius covers B2B professional contacts for sales outreach, not LP or allocator data. For investor contacts, look at Altss ($15,500/yr for full LP coverage), PitchBook ($20k-$50k+/yr), Preqin ($15k-$50k+/yr), or Dakota ($5k-$15k/yr). These platforms are built for capital formation workflows and track the signals that matter - mandate changes, committee shifts, allocation preferences.
What's the best B2B lead database for sales prospecting?
Prospeo delivers 98% email accuracy across 143M+ verified emails with a 7-day refresh cycle, 125M+ verified mobiles, and intent data across 15,000 topics. The free tier includes 75 verified emails per month so you can test data quality before committing - no credit card required. Teams using Prospeo book 26% more meetings than those on ZoomInfo and 35% more than Apollo, largely because fresher data means fewer bounces and more replies.