Prospeo vs FullEnrich (2026): Data, Pricing and API Compared

Prospeo is the cheaper way to find work emails at 10,000 a month. FullEnrich is the better pick for mobile numbers, because it asks 25+ sources for each contact. At 1M records a month only Prospeo prints a price you can add up.

Verdict

• Pick Prospeo if you want the lowest list price per work email, a Chrome extension and a search you can filter yourself. At 10,000 emails a month it costs $189 against FullEnrich's $499, both on monthly billing (Prospeo pricing, September 2026).
• Pick FullEnrich if you already hold names or LinkedIn URLs and need mobiles filled in, and you want unlimited users and credits that roll over (FullEnrich pricing, September 2026).
• Pick neither if you pull people and company data by API at volume. Seats, credits and per-minute caps all get awkward past the top of the price list. LeadOcean is one option, covered below.

Side by side

Data and coverage

Prospeo is a database you search and then enrich. FullEnrich is a service you send a list to. That difference shapes every other row.

Prospeo's own pages do not agree on its size. The homepage claims 280M leads and companies and 143M verified emails, and the API docs say 200M+ contacts and 30M+ companies (Prospeo, September 2026; Prospeo API docs, September 2026). FullEnrich lists 800M people and 50M companies for search. Its 1.6B figure is a customer quote about coverage, not a database size (FullEnrich MCP page, September 2026).

Email is where they overlap. Prospeo charges 1 credit per verified email and nothing for a miss. FullEnrich charges 1 credit for a work email, 3 for a personal one, and states about an 80% find rate on work emails (FullEnrich pricing, September 2026). Both rates are vendor claims. We did not test them.

Phones are where FullEnrich earns its price. Its waterfall asks 25+ sources, so a gap in one is a hit in the next. Prospeo sells a mobile finder at 10 credits per mobile and claims a 30% pick-up rate on mobiles on its homepage (Prospeo, September 2026). Neither publishes a phone count, so run 200 of your own contacts through both before you commit.

Accuracy claims differ in kind. Prospeo's homepage claims 98% data accuracy. FullEnrich says 31.53% of the data it buys fails its triple email verification and never reaches your invoice (FullEnrich, September 2026). Both are vendor numbers, and neither is a test result. Send a sample through each and check the bounce rate yourself.

Seats matter too. Prospeo adds plan credits per seat into one team pool. FullEnrich has unlimited users on every plan, so a team of one and a team of twenty pay the same for the same credits.

API and developer experience

Both tools have a REST API and an MCP server. Prospeo enriches one person in one synchronous call with POST /enrich-person. FullEnrich starts an asynchronous bulk job with POST /contact/enrich/bulk. Placeholders below stand in for real people.

Prospeo, enrich a person by name and company website.

curl --request POST \
  --url "https://api.prospeo.io/enrich-person" \
  --header "X-KEY: $PROSPEO_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
    "only_verified_email": true,
    "data": {
      "first_name": "Jane",
      "last_name": "Doe",
      "company_website": "acme.com"
    }
  }'

A found email costs 1 credit and a mobile costs 10. A miss is free, and so is re-enriching the same record within 90 days (Prospeo enrich docs, September 2026). Prospeo advises the bulk endpoint, up to 50 people per request, for speed.

FullEnrich, start a bulk enrichment for one contact. It takes up to 100.

curl --request POST \
  --url "https://app.fullenrich.com/api/v2/contact/enrich/bulk" \
  --header "Authorization: Bearer $FULLENRICH_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
    "name": "Jane Doe",
    "webhook_url": "https://example.com/webhook",
    "data": [{
      "first_name": "Jane",
      "last_name": "Doe",
      "domain": "acme.com",
      "enrich_fields": ["contact.work_emails", "contact.phones"]
    }]
  }'

You get the result on your webhook, or you poll the enrichment id (FullEnrich docs, September 2026). Prospeo's single call suits a lookup inside a request. FullEnrich's design suits batch pipelines.

Rate limits differ in shape. Prospeo limits per second and per day by plan: enrich is 2,000 a day on Starter, 5,000 on Growth and 500,000 on Pro (Prospeo rate limits, September 2026). FullEnrich allows 60 calls a minute with 100 contacts per request, which is 6,000 contacts a minute. Over the limit it returns HTTP 429 with the code error.rate.limit.

Free plan API access is the one place Prospeo's sources conflict. The pricing table shows none, while the help center lists 50 requests a day (Prospeo help center, September 2026). Test a free key before you plan around it.

Pricing

Prospeo bills per user, and credits expire at the end of each cycle (Prospeo help center, September 2026). FullEnrich bills credits on a slider, and unused credits roll over for 3 months on monthly plans and 12 on annual ones (FullEnrich pricing, September 2026).

The worked example is work-email lookups only, one credit each, at list price.

At 10,000 a month Prospeo costs $189 against $499, about 62% less on monthly billing. Add mobiles and both get expensive fast: 10,000 mobiles are 100,000 credits on either tool. That is $3,500 a month at FullEnrich's top public tier. Prospeo's 100,000-credit add-on is $1,200 on top of a paid plan (Prospeo pricing, September 2026).

At 1M the Prospeo figure is arithmetic on list prices, not a quote. Seats add credits ($249 for 15,000) and the add-on slider stops at 350,000 credits a month and 500,000 a year. Higher volumes need support to enable extended pricing (Prospeo help center, September 2026).

FullEnrich publishes no 1M price. The top monthly tier is 100,000 credits for $3,500, and above that the page says contact sales. The yearly toggle stops at 1,200,000 credits a year for $37,800, which averages 100,000 a month (FullEnrich pricing, September 2026). A million lookups in one month needs a quote.

The credit models also behave differently as you grow. Prospeo's price per credit falls with the plan and the add-on: $0.0166 on a monthly Pro seat, $0.01 at the 350,000 add-on, $0.009 at the yearly 500,000 add-on. FullEnrich's falls along one slider, from $0.058 at 500 credits to $0.035 at 100,000. Prospeo's ladder is lower at every step, but it has more moving parts: seats, add-ons and a billing toggle that removes add-ons when you switch.

Plan against your hit rate. Both tools charge only for what they find, so real cost per contact sits below the list rate.

Where Prospeo wins

• Cheaper work emails at small and mid volume: $189 for 10,000 against $499.
• A real price you can add up at 1M, even if it is $14,456 a month.
• A synchronous enrich call, and a Chrome extension on every plan (Prospeo pricing, September 2026).
• Verified-only mode. You can pay only for records with a verified email.

Where FullEnrich wins

• Mobile coverage. A waterfall over 25+ sources finds numbers one database misses.
• Unlimited users on every plan, with API, MCP and bulk CSV from the free trial up.
• Credits that roll over for 3 months monthly and 12 months yearly. Prospeo credits expire each cycle.
• A bigger search index on paper: 800M people against Prospeo's 200M+ contacts in its API docs.

If you need volume through an API

LeadOcean is the data layer only: 693M people and 63M companies over REST and MCP. Pro is $499 a month flat with no seats and no credits, and Free gives you 1,000 records, one-off, with no card. The limit is 100 requests per second per key, and POST /v1/exports takes up to 50,000 rows per request. LeadOcean has no sequencer, dialer, CRM or Chrome extension, so it replaces neither tool for reps. See pricing.

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