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LeadFlags
What it is
LeadFlags is a paid API and web service for screening inbound leads before they enter a CRM or call queue. It applies predefined rules to information such as names, email addresses, phone numbers, messages, sources, countries, job titles, industries, company sizes, and websites. The same input produces the same result; the scoring process does not use AI, enrichment, or profiling. Results include a score, quality level, risk flags, positive signals, and a recommended routing action. Flexible JSON input can use field aliases and optional mappings for unusual keys. LeadFlags can identify missing or invalid contact details, disposable email addresses, suspicious messages, and mismatched fields. It describes itself as CRM-agnostic, with HubSpot and Salesforce among its examples. API requests require an X-API-Key header. Plans begin at €39/mo, with limits and support varying by tier. Enterprise terms are custom.
For and against
For
- Deterministic rules produce repeatable scoring results
- Flags risky and incomplete lead details
- Flexible JSON input and field aliases
- CRM-agnostic workflow positioning
- Enterprise offers custom thresholds and IP allowlist
Against
- No free plan
- Bearer authorization is not supported
- Starter is limited to 1,000 leads monthly
- Enterprise pricing is custom
The verdict
LeadFlags focuses on predictable, rule-based lead screening with routing-oriented results. Its API access, flexible input, and CRM-agnostic design fit teams that want consistent checks before downstream workflows.
Who it suits
LeadFlags suits marketing agencies, call centers, and lead sellers or buyers needing consistent rule-based screening before CRM workflows.
Plans and prices
Starter
Up to 1,000 leads / month · Full scoring and flags · Email support · Production-ready service
Read 15 Oct 2026 · leadflags.com
Growth
Up to 10,000 leads / month · Priority processing · Fast support · Early access to new scoring logic
Read 15 Oct 2026 · leadflags.com
Scale
Up to 50,000 leads / month · Higher rate limits · Priority support · Basic SLA for availability
Read 15 Oct 2026 · leadflags.com
Enterprise
100,000+ leads · Dedicated SLA and support · IP allowlist · Custom score thresholds
Read 15 Oct 2026 · leadflags.com
On the record
- API access
- API requests use JSON and require an X-API-Key header; the docs say Bearer authorization is not yet supported.leadflags.com · read 7 Oct 2026
- Authentication
- API requests require an X-API-Key header obtained from the dashboard.leadflags.com · read 15 Oct 2026
- Bearer limitation
- Bearer authorization is documented as coming soon; X-API-Key is currently the supported method.leadflags.com · read 15 Oct 2026
- CRM positioning
- LeadFlags describes itself as CRM-agnostic and intended to sit before any CRM, call center or workflow.leadflags.com · read 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.leadflags.com · read 15 Oct 2026
- Custom thresholds
- Enterprise requests can pass mid and low query parameters to customize score cutoffs.leadflags.com · read 15 Oct 2026
- Deterministic scoring
- The documentation says identical input produces identical output using predefined, transparent rules.leadflags.com · read 15 Oct 2026
- Enterprise controls
- Enterprise plans list an IP allowlist, dedicated SLA and support, and custom score thresholds.leadflags.com · read 7 Oct 2026
- Features
- LeadFlags identifies signals such as missing or invalid contact details, disposable email, suspicious messages, and inconsistencies between fields.leadflags.com · read 7 Oct 2026
- Flexible input
- The API accepts JSON without a fixed schema, recognizes field aliases, and allows optional mapping overrides for nonstandard keys.leadflags.com · read 7 Oct 2026
- Flexible schema
- The API accepts arbitrary JSON without a fixed schema and detects fields through aliases.leadflags.com · read 15 Oct 2026
- Independent design
- The About page says the service operates independently from CRMs and marketing tools.leadflags.com · read 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.leadflags.com · read 7 Oct 2026
- Intended users
- The site names marketing agencies, call centers, and lead sellers and buyers as audiences for consistent lead scoring.leadflags.com · read 7 Oct 2026
- IP allowlist
- Enterprise can restrict accepted API traffic to authorized IP addresses.leadflags.com · read 15 Oct 2026
- JSON API
- The service exposes POST /api/score-lead and requires JSON request bodies.leadflags.com · read 15 Oct 2026
- Limit: API authentication
- Integrators cannot currently use Bearer authorization because the documentation says it is not yet supported.leadflags.com · read 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.leadflags.com · read 15 Oct 2026
