LeadFlags
LeadFlags is a lead-scoring API and web service that screens inbound leads before they reach a CRM or call queue.
What LeadFlags is
LeadFlags is a lead-scoring API and web service that screens inbound leads before they reach a CRM or call queue. It applies predefined rules to inputs such as name, email, phone, message, source, country, job title, industry, company size, and website. The same input produces the same result, and scoring does not use AI, enrichment, or profiling. Results include a score, quality level, risk flags, positive signals, and a recommended routing action. LeadFlags can flag missing or invalid contact details, disposable email, suspicious messages, and inconsistencies between fields. Its JSON API accepts input without a fixed schema, recognizes field aliases, and permits mapping overrides for unusual keys. The service describes itself as CRM-agnostic, with HubSpot and Salesforce among the examples given. API requests require an X-API-Key header; Bearer authorization is not supported. Starter costs €39 a month for up to 1,000 leads; Growth costs €99 a month for up to 10,000, and Scale costs €249 a month for up to 50,000. Annual billing offers a 20% discount.
Good
- Same input produces the same scoring output
- Accepts JSON without a fixed schema
- Returns routing recommendations and risk flags
- CRM-agnostic, with HubSpot and Salesforce examples
- Annual billing offers a 20% discount
Watch out
- No free plan
- Starter covers up to 1,000 leads monthly
- API requires an X-API-Key header
- Bearer authorization is not supported
Who it suits
LeadFlags suits marketing agencies, call centers, and lead sellers or buyers seeking consistent rule-based screening before a CRM or call queue. It offers API and web access.
Verdict
LeadFlags offers predictable, rule-based lead screening with flexible JSON input and routing recommendations. Its plans have monthly lead limits, and API users must use an X-API-Key header rather than Bearer authorization.
Plans and prices
From LeadFlags's own pricing page, checked 15 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Starter | €39 a month | Up to 1,000 leads / month · Full scoring and flags · Email support · Production-ready service · 39 € / month; annual billing offers −20% discount |
| Growth | €99 a month | Up to 10,000 leads / month · Priority processing · Fast support · Early access to new scoring logic · 99 € / month; annual billing offers −20% discount |
| Scale | €249 a month | Up to 50,000 leads / month · Higher rate limits · Priority support · Basic SLA for availability · 249 € / month; annual billing offers −20% discount |
| Enterprise | Priced on request | 100,000+ leads · Dedicated SLA and support · IP allowlist · Custom score thresholds · Custom billing and terms |
The facts
Each one read from LeadFlags's own pages, with the date it was checked.
What it does
- API access
- API requests use JSON and require an X-API-Key header; the docs say Bearer authorization is not yet supported.checked 7 Oct 2026
- Authentication
- API requests require an X-API-Key header obtained from the dashboard.checked 15 Oct 2026
- Bearer limitation
- Bearer authorization is documented as coming soon; X-API-Key is currently the supported method.checked 15 Oct 2026
- CRM positioning
- LeadFlags describes itself as CRM-agnostic and intended to sit before any CRM, call center or workflow.checked 15 Oct 2026
- Cross-field checks
- The API can flag mismatches such as name versus email, email domain versus website and source versus email type.checked 15 Oct 2026
- Custom thresholds
- Enterprise requests can pass mid and low query parameters to customize score cutoffs.checked 15 Oct 2026
- Deterministic scoring
- The documentation says identical input produces identical output using predefined, transparent rules.checked 15 Oct 2026
- Enterprise controls
- Enterprise plans list an IP allowlist, dedicated SLA and support, and custom score thresholds.checked 7 Oct 2026
- Features
- LeadFlags identifies signals such as missing or invalid contact details, disposable email, suspicious messages, and inconsistencies between fields.checked 7 Oct 2026
- Flexible input
- The API accepts JSON without a fixed schema, recognizes field aliases, and allows optional mapping overrides for nonstandard keys.checked 7 Oct 2026
- Flexible schema
- The API accepts arbitrary JSON without a fixed schema and detects fields through aliases.checked 15 Oct 2026
- Independent design
- The About page says the service operates independently from CRMs and marketing tools.checked 15 Oct 2026
- Integrations
- LeadFlags describes itself as CRM-agnostic and says it can be used before any CRM or workflow; the site mentions HubSpot and Salesforce as examples.checked 7 Oct 2026
- Intended users
- The site names marketing agencies, call centers, and lead sellers and buyers as audiences for consistent lead scoring.checked 7 Oct 2026
- IP allowlist
- Enterprise can restrict accepted API traffic to authorized IP addresses.checked 15 Oct 2026
- JSON API
- The service exposes POST /api/score-lead and requires JSON request bodies.checked 15 Oct 2026
- Limit: API authentication
- Integrators cannot currently use Bearer authorization because the documentation says it is not yet supported.checked 15 Oct 2026
- Limit: no published licence
- The opened official documentation and About pages do not state an open-source licence or self-hosting option.checked 15 Oct 2026
- Limit: support guarantee
- The docs state ordinary email support has no guaranteed response time.checked 15 Oct 2026
- LinkedIn audience signal
- The public LinkedIn LeadFlags page showed one follower when the post was indexed.checked 15 Oct 2026
- LinkedIn launch
- LeadFlags’ LinkedIn post announces that the product is live as a deterministic lead-quality scoring API.checked 15 Oct 2026
- LinkedIn lock-in claim
- The launch post describes the service as having no CRM lock-in.checked 15 Oct 2026
- LinkedIn output
- The launch post says results include a normalized score, quality level, explanatory flags and a recommended action.checked 15 Oct 2026
- LinkedIn schema claim
- The LinkedIn post says the API has no fixed schema for inbound lead data.checked 15 Oct 2026
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