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LeadFlags

leadflags.com

From €39/mo WebAPI
Visit leadflags.com
Spec score 8.2 #8 of 24 in Lead Scoring Software

What it is

LeadFlags is a deterministic lead-scoring API and web service that filters fake, low-intent, and risky inbound leads before they reach a CRM or call queue. It returns a score, quality level, risk flags, positive signals, and a recommended routing action. Predefined rules give the same output for the same input, without AI, enrichment, or profiling. JSON requests have no fixed schema; field aliases and optional mapping overrides support nonstandard keys. The service can identify missing or invalid contact details, disposable email, suspicious messages, and inconsistent fields. It is described as CRM-agnostic, with HubSpot and Salesforce named as examples. Requests require an X-API-Key header; Bearer authorization is not supported. Starter costs €39 a month for up to 1,000 leads, Growth €99 a month for up to 10,000, and Scale €249 a month for up to 50,000. Enterprise uses custom billing and terms. Annual billing offers a 20% discount.

Spec sheet

What it does
LeadFlags evaluates inbound leads and returns a numeric quality score, quality level, explanatory flags, positive signals and a recommended action.Read 15 Oct 2026 · leadflags.com
Purpose
The maker says it was built to answer consistently whether a lead is worth a sales call.Read 15 Oct 2026 · leadflags.com
Intended users
The site names marketing agencies, call centers, and lead sellers and buyers as audiences for consistent lead scoring.Read 7 Oct 2026 · leadflags.com
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.Read 7 Oct 2026 · leadflags.com
Support
The pricing page lists email support for Starter, fast support for Growth, priority support for Scale, and dedicated support for Enterprise.Read 7 Oct 2026 · leadflags.com
Maker
The About page describes why LeadFlags was built but does not state a maker name, headquarters, or founding date.Read 7 Oct 2026 · leadflags.com
API access
API requests use JSON and require an X-API-Key header; the docs say Bearer authorization is not yet supported.Read 7 Oct 2026 · leadflags.com
Authentication
API requests require an X-API-Key header obtained from the dashboard.Read 15 Oct 2026 · leadflags.com
Bearer limitation
Bearer authorization is documented as coming soon; X-API-Key is currently the supported method.Read 15 Oct 2026 · leadflags.com
CRM positioning
LeadFlags describes itself as CRM-agnostic and intended to sit before any CRM, call center or workflow.Read 15 Oct 2026 · leadflags.com
Cross-field checks
The API can flag mismatches such as name versus email, email domain versus website and source versus email type.Read 15 Oct 2026 · leadflags.com
Custom thresholds
Enterprise requests can pass mid and low query parameters to customize score cutoffs.Read 15 Oct 2026 · leadflags.com
Deterministic scoring
The documentation says identical input produces identical output using predefined, transparent rules.Read 15 Oct 2026 · leadflags.com
Enterprise controls
Enterprise plans list an IP allowlist, dedicated SLA and support, and custom score thresholds.Read 7 Oct 2026 · leadflags.com
Features
LeadFlags identifies signals such as missing or invalid contact details, disposable email, suspicious messages, and inconsistencies between fields.Read 7 Oct 2026 · leadflags.com
Flexible input
The API accepts JSON without a fixed schema, recognizes field aliases, and allows optional mapping overrides for nonstandard keys.Read 7 Oct 2026 · leadflags.com
Flexible schema
The API accepts arbitrary JSON without a fixed schema and detects fields through aliases.Read 15 Oct 2026 · leadflags.com
Independent design
The About page says the service operates independently from CRMs and marketing tools.Read 15 Oct 2026 · leadflags.com
IP allowlist
Enterprise can restrict accepted API traffic to authorized IP addresses.Read 15 Oct 2026 · leadflags.com
JSON API
The service exposes POST /api/score-lead and requires JSON request bodies.Read 15 Oct 2026 · leadflags.com
Limit: API authentication
Integrators cannot currently use Bearer authorization because the documentation says it is not yet supported.Read 15 Oct 2026 · leadflags.com
Limit: no published licence
The opened official documentation and About pages do not state an open-source licence or self-hosting option.Read 15 Oct 2026 · leadflags.com
Limit: support guarantee
The docs state ordinary email support has no guaranteed response time.Read 15 Oct 2026 · leadflags.com
LinkedIn audience signal
The public LinkedIn LeadFlags page showed one follower when the post was indexed.Read 15 Oct 2026 · linkedin.com
LinkedIn launch
LeadFlags’ LinkedIn post announces that the product is live as a deterministic lead-quality scoring API.Read 15 Oct 2026 · linkedin.com
LinkedIn lock-in claim
The launch post describes the service as having no CRM lock-in.Read 15 Oct 2026 · linkedin.com
LinkedIn output
The launch post says results include a normalized score, quality level, explanatory flags and a recommended action.Read 15 Oct 2026 · linkedin.com
LinkedIn schema claim
The LinkedIn post says the API has no fixed schema for inbound lead data.Read 15 Oct 2026 · linkedin.com
LinkedIn stated use
The LinkedIn announcement says the API is intended to filter low-quality, fake and spam leads before they reach pipelines.Read 15 Oct 2026 · linkedin.com
Mapping overrides
A reserved _leadflags_map object can map nonstandard payload keys to canonical fields.Read 15 Oct 2026 · leadflags.com
Named CRM examples
The product page names HubSpot and Salesforce as examples of systems that can receive routed results.Read 15 Oct 2026 · leadflags.com
No AI enrichment
LeadFlags states that scoring does not use AI, enrichment or profiling.Read 15 Oct 2026 · leadflags.com
No CRM ownership
The About page says LeadFlags does not manage pipelines, attribution or outreach.Read 15 Oct 2026 · leadflags.com
Normalization endpoint
The documentation describes a normalize-lead endpoint that reports detected fields, missing fields, conflicts and warnings.Read 15 Oct 2026 · leadflags.com
Positive signals
Positive outputs can identify business domains, consistent identity, quality messages and commercial intent.Read 15 Oct 2026 · leadflags.com
Privacy approach
The API documentation says geographic fields are used only for consistency checks and that LeadFlags does not profile leads.Read 7 Oct 2026 · leadflags.com
Quality bands
Scores map to strong, high, medium or low quality levels.Read 15 Oct 2026 · leadflags.com
Rate limits
The documentation gives example limits of 60 requests per minute for Starter, 300 for Growth and 1,000 for Scale.Read 15 Oct 2026 · leadflags.com
Risk flags
Documented risk checks include missing or invalid email, disposable email, missing or fake phone, suspicious messages and source problems.Read 15 Oct 2026 · leadflags.com
Routing actions
Recommended actions are high_priority, standard_priority, review or discard.Read 15 Oct 2026 · leadflags.com
Scoring method
The documentation says scoring uses predefined rules, produces the same output for the same input, and does not use AI, enrichment, or profiling.Read 7 Oct 2026 · leadflags.com
Scoring output
The API returns a score, quality level, risk flags, positive signals, and a recommended action for routing leads.Read 7 Oct 2026 · leadflags.com
Support levels
Starter has email support, Growth adds faster support, Scale has priority support and Enterprise lists dedicated support.Read 15 Oct 2026 · leadflags.com
Supported lead fields
Recognized data includes names, email, phone, messages, sources, country, job title, industry, company size and website.Read 15 Oct 2026 · leadflags.com

Plans and prices

Starter €39 a month 39 € / month; annual billing offers −20% discount Up to 1,000 leads / month · Full scoring and flags · Email support · Production-ready service Read 15 Oct 2026 · leadflags.com
Growth €99 a month 99 € / month; annual billing offers −20% discount Up to 10,000 leads / month · Priority processing · Fast support · Early access to new scoring logic Read 15 Oct 2026 · leadflags.com
Scale €249 a month 249 € / month; annual billing offers −20% discount Up to 50,000 leads / month · Higher rate limits · Priority support · Basic SLA for availability Read 15 Oct 2026 · leadflags.com
Enterprise Priced on request Custom billing and terms 100,000+ leads · Dedicated SLA and support · IP allowlist · Custom score thresholds Read 15 Oct 2026 · leadflags.com

Every LeadFlags plan and price →

Strong points and limits

Strong points

  • Deterministic rules produce repeatable outputs
  • Accepts flexible JSON without fixed schema
  • Returns scores, flags, signals, and actions
  • CRM-agnostic with HubSpot and Salesforce examples
  • Annual billing offers a 20% discount

Limits

  • No free plan
  • Bearer authorization is not supported
  • Starter limit is 1,000 leads monthly
  • Enterprise pricing uses custom billing

Who it suits

LeadFlags suits marketing agencies, call centers, and lead sellers or buyers needing consistent rule-based screening before CRM or workflow routing. It fits teams that want API-based scoring without predictive modeling.

Verdict

LeadFlags provides transparent, repeatable screening through a flexible API and web service. Its paid plans scale by monthly lead volume, while authentication currently requires an X-API-Key header.

Where Specifiction places it

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