Best B2B data providers · source databases, not enrich toys
You're here because listicles mash databases, enrich toys, and orchestration into one pile. Source means who you put on the table.
pick this stack
Who wins
Apollo wins mainstream database plus sequences. AI Ark wins lookalike and cheap verified first-pass export. FullEnrich wins hard gaps after the table exists. Sales Navigator wins title precision as a side seat. Clay wins orchestration only when the team already owns it.
- Source puts people on the table. Enrich fills empties later.
- Apollo: database plus unlock plus light sequences. Email 1 credit. Phone 8.
- AI Ark: free 100 credits a month. $49 for 5,000 credits. FAQ volume near $2 to $4 per 1,000.
- Cheap first pass, then cascade empties. Track cost per valid.
- FullEnrich is resolve after source, not the database default.
- Clay is not a B2B data provider. It orchestrates keys you bring.
Ranked picks
Compare
| Tool | Price band | Best for | Dealbreaker |
|---|---|---|---|
| #1 Apollo | Free is 900 credits per… | Mainstream B2B contact database with search, unlock, export, and light sequences in one seat. | Not a multi-vendor waterfall for stubborn empties. |
| #2 AI ARK | Free: 100 credits per month. | Lookalike TAM and cheap verified first-pass export before a hard resolve hop. | Not the managed mobile closer. |
MethodHow we scored these tools▾
Picks follow the source layer only: who goes on the table before enrich. Apollo and AI Ark carry the opens. FullEnrich is resolve after. Prices checked 2026-09-25 on vendor pricing pages where the sticker is public.
Who for
buy if
- You need a contact database or lookalike export before enrich.
- You will measure cost per valid email, not cost per raw lead.
- You want a clear split between source and waterfall resolve.
- You may add Sales Navigator for title precision beside the database.
skip if
- Skip this if you only need waterfall enrich. See waterfall enrichment tools.
- Skip this if you want ZoomInfo alternatives as the whole guide. See Apollo alternatives.
- Skip this if you want lookalike motion as a deeper build guide. See list build and lookalikes.
- Skip this if you expect Clay to be your contact database.
Source vs enrich · do not mash the jobs
Source means who you put on the table. Enrich means filling empty emails and phones.
Apollo and AI Ark are source tools first. FullEnrich and BetterContact are resolve tools after.
If a vendor pitch sells database plus waterfall plus sequencer as one logo, split the invoices in your head before you buy.
Cheap first pass · then cascade empties
Do not spend hard resolve credits on every row.
Run Apollo or AI Ark as a first pass. Keep the valids. Cascade only the empties into a waterfall or FullEnrich.
Track cost per valid email. Cost per lead row lies when half the list never verifies.
AI Ark vs FullEnrich · coverage vs price and speed
These two get mashed in listicles. They are different jobs.
AI Ark wins when you need price and speed on source fill. FullEnrich wins when hard coverage or mobile remains after the table exists.
Stack them in that order when both jobs show up. Do not force one tool to do both.
Clay is not your data provider
Clay can orchestrate enrich and list steps if someone on your team owns it and brings their own keys.
Clay does not own a contact database of its own. Calling it a B2B data provider confuses the buy.
Start with Apollo or AI Ark for source. Add Clay only if the wiring job is already staffed.
What to skip on this shortlist
Skip ZoomInfo alternatives as the frame. That longer guide lives on Apollo alternatives.
Skip treating FullEnrich as the source default. Link enrichment and waterfall guides when resolve is the stuck job.
Skip LeadMagic or Instantly as the database open. Wrong layer for this shortlist.
FAQ
Is Clay a B2B data provider?▾
No. Clay orchestrates steps and keys you bring. It does not own the contact database. Buy Apollo or AI Ark for source. Add Clay only if your team already wires it.
Apollo vs AI Ark for list building?▾
Apollo when you want one mainstream seat for search, unlock, and light sequences. AI Ark when lookalike or cheap verified first-pass export is stuck. Both can feed a later resolve hop.
When do I add FullEnrich after the database?▾
When empties or mobile remain after Apollo or AI Ark fill. FullEnrich is the managed closer. It is not the source default on this shortlist.
Where does Sales Navigator fit?▾
Beside the database for title and account precision. It is not a bulk export tool and not a waterfall.
Why isn't ZoomInfo the open?▾
This shortlist is an operator source layer with Apollo and AI Ark. ZoomInfo alternatives already live on the Apollo alternatives guide.
next step
Closing
If you need a mainstream database seat, open Apollo. If lookalike or cheap verified export is stuck, open AI Ark. If hard gaps or mobile remain after the table exists, open FullEnrich. Source first. Enrich second. Try Apollo Try AI Ark Try FullEnrich