Exellius vs TAMI AI: Which B2B Data Tool Is Worth Your Budget?
There's almost no comparison content out there for these two tools. They're different enough that picking the wrong one wastes real money - so here's an honest breakdown of pricing, data quality, and use cases.
30-Second Verdict
- Pick TAMI AI if you're a small team that needs technographic filtering and e-commerce vertical targeting with a self-serve SaaS experience.
- Pick Exellius if you want a credit-based tool for email finding, verification, enrichment, and technographics - without per-seat pricing.
Feature Comparison
| TAMI AI | Exellius | Winner | |
|---|---|---|---|
| Database size | 17M+ companies, 450M contacts | 300M+ professional profiles | Exellius (raw volume) |
| Pricing model | Per user/month | Credit-based, unlimited seats | Exellius (no per-seat tax) |
| Starting price | Free (£0) | Free ($0/month) | Tie |
| Email/mobile credits | 50-500 exports; 5-80 mobiles depending on tier | 75-25,000 credits/month; Enterprise unlimited | Depends on team size |
| CRM integrations | Yes, but reviewers say sync isn't truly real-time | API + webhooks + bulk workflows | Exellius (automation flexibility) |
| Review confidence | 4.4/5 Capterra (131 reviews), 4.3/5 G2 (139 reviews) | Minimal third-party reviews | TAMI |
| Best for | Technographic filtering, SMB teams | Email finding + verification + enrichment + bulk workflows | Split |
TAMI AI - What You Get
TAMI's filtering engine is the real draw. If you're targeting e-commerce companies by tech stack, geography, or company size, the segmentation tools deliver. One G2 reviewer put it simply: "The search part is really good... filter and find new leads real easy." The Chrome companion works well for prospecting, and customer service scores a 4.7 on Capterra - unusually high for a data tool.
Pricing breaks into four tiers: Free (50 exports, 5 mobile credits), Basic at £39/user/month (250 exports, 40 mobiles), Growth at £59/user/month (500 exports, 80 mobiles), and Enterprise with custom pricing and unlimited export credits. A 5-person SDR team on Growth pays £295/month - reasonable for the category.
The problems are real, though. Capterra reviewers consistently flag contacts appearing under wrong companies, slow page loading, and CRM integrations that don't sync in real time. One reviewer noted "turnover statistics are not always correct," while another said "bounce rate is close to what has been advertised." We looked for Reddit discussion on TAMI's B2B tool and found virtually nothing - the few threads that came up were about unrelated products, which tells you something about adoption outside its niche.
Here's the thing: strong filtering doesn't matter much if the contacts it surfaces bounce at 8-10%. We've seen teams fall in love with a segmentation UI only to torch their sender reputation in the first week of outbound. If you go with TAMI, verify every list through a separate tool before loading it into sequences.
If you're building a repeatable outbound motion, it also helps to standardize your sales prospecting techniques so list quality issues don’t get masked by inconsistent execution.
Both TAMI and Exellius leave you guessing on email accuracy. Prospeo delivers 98% verified emails on a 7-day refresh cycle - not the 6-week industry average. At $0.01 per email with no per-seat pricing, you get the volume of Exellius and the filtering depth of TAMI without the bounce risk.
Stop choosing between good filters and good data. Get both.
Exellius - What You Get
Exellius is a self-serve B2B data platform with credit-based plans and unlimited seats. It's built around the workflows most outbound teams actually need: email finding by name and domain, domain search, real-time and bulk email verification, phone number lookup, contact and company enrichment, technographics, bulk tasks, and an API hub with webhooks.
One thing worth clarifying: if you've seen "Exellius Systems" on a data marketplace like Datarade, that's a separate marketplace-style listing. On Datarade, Exellius Systems claims 160M+ decision makers, 181M+ B2B emails, and 75M+ phone contacts, with a 4.9/5 rating from just 3 reviews. Marketplace pricing ranges from $0.01 per CPL up to $100/year, and they offer free samples.
For Amazon seller intelligence specifically, Exellius also appears in third-party dataset roundups at $100 per 1,000 leads with up to three decision-maker contacts per seller, delivered in JSON/CSV via SFTP or S3 bucket.
Let's be honest about marketplace data: if you're buying bulk B2B records from a listing with 3 reviews, test a small sample before committing any real budget. We've seen teams burn through thousands on marketplace datasets that bounce at 10-15%, and there's no undo button on domain reputation damage.
Key Differences That Matter
These aren't minor feature gaps. They're fundamentally different buying motions.
Pricing structure. TAMI charges per user per month (£39-£59). Exellius uses credit-based plans with unlimited seats. You can't do an apples-to-apples comparison without knowing your exact volume, but a small team doing steady prospecting often prefers TAMI's predictable per-seat pricing, while teams running heavy verification and bulk workflows tend to prefer credits.
Filtering vs. workflow depth. TAMI is built around segmentation - finding the right slice of companies fast, especially in e-commerce and technographics. Exellius is built around getting usable contact data out the door: find, verify, enrich, grab phone numbers, push it all into workflows via bulk tools and API. Different jobs.
Review confidence. TAMI has 270+ reviews across G2 and Capterra with clear patterns: strong filtering, mediocre data accuracy. Exellius doesn't have comparable third-party review volume, so TAMI has the clearer trust signal from the market.
Niche strengths. TAMI wins for technographic and e-commerce vertical filtering. Exellius wins when your day-to-day is email finding, verification, enrichment, and bulk processing.
One benchmark worth keeping in mind: industry best practice keeps total bounces below 2%, and top performers target hard bounces under 1% for healthy outbound. Unverified marketplace lists routinely hit 5-15% bounce rates, which is why data accuracy matters more than database size every single time.
If you want a deeper breakdown of bounce thresholds and what they mean operationally, see our guide on email bounce rate.
When Neither Tool Fits
If your actual bottleneck is verified emails and direct dials - not technographic filtering or credit-based workflows - neither TAMI nor Exellius is the cleanest fit.
With credit-based pricing at roughly $0.01 per email, no per-seat charges, and a free tier of 75 verified emails monthly, you can validate quality before spending a dollar. Teams running outbound at volume also get 30+ search filters including buyer intent data across 15,000 topics, technographics, and job-change signals - so you're not sacrificing targeting precision for deliverability.
If you’re pressure-testing your stack, it can help to compare broader outbound lead generation tools and where data providers fit.
The article's benchmark is clear: keep bounces under 2% or risk your domain. TAMI reviewers report inconsistent accuracy. Exellius marketplace data can bounce at 10-15%. Prospeo's 5-step verification and proprietary email infrastructure keep bounce rates under 4% - proven across 15,000+ companies.
Test 75 verified emails free. No credit card, no sales call, no risk.
Final Verdict
Pick TAMI AI if you're targeting specific verticals with technographic filters and want predictable per-user pricing. A 5-person Growth team runs £295/month. Verify contact data before loading it into sequences - the filtering is strong, but accuracy is inconsistent.
Pick Exellius if you want a credit-based, unlimited-seat platform for email finding, verification, enrichment, technographics, and bulk workflows. It's a better fit when your team cares more about workflow throughput than per-seat economics.
FAQ
Does TAMI AI have a free plan?
Yes - 50 export credits and 5 mobile credits per month, no credit card required. That's enough to test filtering and data quality before upgrading to Basic (£39/user/month) or Growth (£59/user/month).
Is Exellius a SaaS platform or a data marketplace?
Both, sort of. Exellius operates as a self-serve SaaS platform with credit-based plans and unlimited seats. Separately, "Exellius Systems" appears as a marketplace-style data provider on Datarade, where you can buy datasets and request samples. These are distinct offerings, so make sure you're looking at the right one for your use case.
What's a good alternative if neither fits?
For teams prioritizing email accuracy above all else, Prospeo is the strongest option - 98% verified emails, 125M+ mobile numbers, and a free tier of 75 credits monthly. Unlike marketplace datasets, every record runs through 5-step verification on a 7-day refresh cycle.