Best Waterfall Enrichment Tools for HubSpot Users (2026)

Bitscale is built around the idea that enrichment belongs inside the CRM, not in a spreadsheet you export to and import back from. It reads and writes HubSpot natively, runs a waterfall across 100+ data sources, and, most importantly for HubSpot admins, pushes back only the fields that changed. You also choose which HubSpot properties Bitscale is allowed to update, so a rep's hand-verified phone number stays out of reach of a nightly refresh job.

The credit model suits CRM hygiene work. According to Bitscale's docs, a found email or phone number costs 1 platform credit, and failed lookups, formula columns, and CRM syncs are free. That means re-running enrichment on stale HubSpot records doesn't burn credits on the contacts nobody can find. Records are matched on HubSpot record ID or company domain, which keeps write-backs from creating duplicates. On top of that sit buying signals and inbound integrations such as RB2B and Factors, so a website visitor can land in HubSpot already enriched.

The drawback is gating. The Free plan's 200 lifetime credits are enough to test the waterfall, but the two-way HubSpot integration starts on Growth at $349/month (15,000 credits, rolling over up to 3x). Salesforce sync waits until Booster at $799/month, so HubSpot users get the better deal here.

Clay is the reference point for waterfall enrichment: 150+ providers, a spreadsheet interface where each column can be a provider, a formula, or a Claygent AI research step, and full control over the order providers run in. For HubSpot users, that flexibility means you can build a waterfall that tries your cheapest email provider first, verifies the result, and only then falls through to a premium source for mobile numbers.

The HubSpot side needs more care than Bitscale's. Clay's HubSpot update action has an Ignore blank values toggle, so an empty enrichment won't wipe a populated field, but it has no built-in "only update if the HubSpot field is blank" option. Clay's own guidance is to map only the columns you mean to change and add a conditional run so the write fires only when a new value exists. That works well once it's built, but it's logic you maintain, not a setting you flip.

Pricing is the other consideration. Clay's 2026 pricing splits costs into data credits and actions, and CRM integrations start on Growth at $495/month ($446/month billed annually), with 6,000 data credits per month. The $185/month Launch plan includes phone enrichment and signals but not the HubSpot integration, so you'd be moving data by CSV. Credit cost per record depends on which providers sit in your waterfall.

FullEnrich is a pure contact-finding waterfall: it aggregates 20+ email and phone vendors, triple-verifies emails, and charges only for what it finds. The credit math is simple and published: 1 credit for a work email, 3 for a personal email, 10 for a mobile number, and nothing when no data is found or the number is a landline.

For HubSpot users, the standout is that the native HubSpot connection is included on every plan, from the 50-credit free trial up. FullEnrich pushes contacts and companies into HubSpot and HubSpot lists, deduplicates them, and gives you a review step before anything lands. Each field can be set to Complete if missing (fills only empty properties) or Override field (always overwrites). That's the clearest overwrite control in this list, and it costs nothing extra.

The limitation is direction. Today the HubSpot connection works best for pushing newly enriched leads into the CRM. FullEnrich's own pricing page marks enriching contacts that already exist in HubSpot, and running enrichment from inside HubSpot, as coming soon. If your main job is backfilling a 30,000-contact database, check that status first. Pro starts at $29/month for 500 credits and scales to $255 for 5,000 and $499 for 10,000.

Surfe approaches enrichment from the rep's side rather than the database's. It runs inside LinkedIn and Gmail, and when a rep finds a prospect, Surfe runs a waterfall across 15+ data providers and creates the HubSpot contact with email and phone already filled in. The native two-way HubSpot app syncs contacts, companies, notes, tasks, and LinkedIn conversations, maps custom fields, and checks for duplicates before creating records. With 14,000 installs and a 4.5/5 rating from 142 reviews, it's the most widely adopted app in this list on the HubSpot Marketplace.

The credit model is per user and split into separate pools: each found email or phone costs 1 credit from its own allowance, even when several providers were queried, and misses are free. Essential costs $39/user/month billed annually ($49 monthly) and includes full HubSpot sync with 1,800 email and 600 mobile credits per year. Pro, at $79/user/month, raises that to 12,000 email and 1,200 mobile credits.

The trade-off is scale. Surfe is built for enriching contacts as reps work, plus ongoing enrichment and job-change alerts on synced records, not for bulk-backfilling an entire HubSpot portal. Bulk waterfall enrichment through the API is an Enterprise feature, and Surfe doesn't publish whether its write-back fills only empty fields.

BetterContact is the cheapest way into a native HubSpot waterfall. It routes each lookup through 20+ providers, charges 1 credit for a valid email and 10 for a valid mobile number, and charges nothing when it comes back empty. Paid plans start at $15/month for 200 credits, with Pro at $49/month for 1,000 credits and tiers up to 50,000.

Its HubSpot Marketplace app has two parts that fit everyday HubSpot work. A CRM sidebar card lets a rep enrich a single contact from the record page. A workflow action enriches contacts when they enroll in a HubSpot workflow and writes the results into contact properties. That second piece is useful: you can enrich only form fills that match your ICP, or only contacts entering a sales-ready lifecycle stage, instead of spending credits on your whole database.

The app is still young. It has about 90 installs and a 2.7/5 rating from 3 reviews, one of which says it mainly finds mobile numbers. Neither the HubSpot listing nor BetterContact's pages say whether write-back fills only empty properties or overwrites, so test on a copy of a list first. The listing names the Free and Pro plans as supported, and Zapier and Clay integrations come with Pro.

Databar is a broader enrichment workspace that happens to include a strong waterfall. Its email waterfalls chain 9 providers, phone waterfalls chain 10, and you can add verifiers like ZeroBounce or Bouncer at the end. Beyond contacts, it has company data, reverse-email lookups, and dozens of connectors for technographics and other data types, so it suits teams that want more than email and phone in HubSpot.

The HubSpot integration is a native OAuth app. You can import all or filtered contacts and companies (up to 10,000 matches per search), look up linked deals for free, and write back through create-or-update exports. HubSpot calls use Databar's Actions rather than enrichment credits, and Actions are unlimited on Scale. CRM integrations start on the Build plan at $99/month ($87/month billed annually) with 5,000 credits.

The caution is overwrite behavior. Only the properties you map are written, but a mapped property overwrites the existing HubSpot value: Databar's docs list no fill-only-empty or changed-only option and tell you to review your mapping. Credit cost per lookup also isn't published up front. Connectors cost 4 to 20 credits per run depending on the provider, and an email that fails verification is still charged.