Stop wasting sales time on low-quality leads.
LeadFlags filters fake, low-intent and risky leads before they reach your CRM.
Deterministic scoring. No AI guesswork. 5-minute integration.
The cost of unprioritized inbound leads
When inbound leads aren’t scored, your team wastes time on low-quality and fake leads. Agents call leads with no phone, fake emails, or no real intent—while high-intent prospects wait. The result: higher cost per conversion and lower productivity for sales operations and marketing operations.
- Wasted calls — Time and payroll spent on leads that never convert.
- Low efficiency — No way to tell which leads deserve a call first.
- Higher cost per sale — More calls per conversion because quality isn’t filtered at the gate.
Lead validation before your workflow
LeadFlags is a deterministic lead scoring API. Apply lead validation to every inbound lead: get a score, quality level, flags, and recommended action. Filter at the gate—before your CRM or call queue—so only qualified leads get agent time.
- Reduce wasted calls — Route only leads that meet your bar.
- Prioritize best leads — Your team responds to high-intent first.
- Save agent time — Less manual triage, fewer low-value contacts.
- Deterministic scoring — Same input, same result. Routing stays predictable.
How it works
CRM-agnostic lead scoring API. Three steps. You decide how to use the score and recommended action.
-
Send lead data
Send your lead data as JSON. We recognize a wide range of fields — no fixed schema required.
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Get score + flags
Receive a score (0–100), quality level (high / medium / low), and flags that explain each deduction.
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Act with confidence
Use the recommended action (call immediately, review first, or do not call) to route leads and focus your team on what converts.
What you get
Lead validation for inbound leads: fewer wasted calls, predictable routing, and a deterministic scoring model your sales operations and marketing operations can rely on.
- Lower cost per conversion — Fewer calls per sale by filtering at the gate.
- Faster response to best leads — Score and route before leads hit your CRM; high-quality leads get attention first.
- Less wasted effort — Agents spend less time on low-quality leads, fake leads, and manual triage.
- Explainable decisions — Every score comes with flags (e.g. missing phone, disposable email). You can justify routing to your team and clients.
- CRM-agnostic — Use LeadFlags in front of any CRM or workflow. You decide where the score and recommended action go.
Who uses LeadFlags
Sales operations and marketing operations that need consistent lead quality scoring at scale.
- Marketing agencies — Score inbound leads before passing to clients or internal SDRs. Same criteria for every campaign; fewer wasted callbacks.
- Call centers — Filter leads at the gate so agents call only qualified contacts. Less time on bad numbers and fake data; higher productivity per agent.
- Lead sellers and buyers — Apply one scoring standard to lead lists. Buyers get a clear quality signal; sellers demonstrate quality in a consistent way.
Deterministic scoring
Deterministic scoring: same input, same result. Running a lead pipeline at scale requires consistent rules so your sales operations and marketing operations know what to expect. LeadFlags uses predefined quality criteria—no drift, no surprises.
- Predictable scoring — Rules are clear and repeatable. Your operations and systems know what to expect.
- Same lead, same result — Your integrations and routing logic get consistent inputs every day.
- Built for volume — Score thousands of leads reliably every day. That’s what LeadFlags is for.
What we stand for
LeadFlags is not intelligence. It is reliability.
Same input, same result. Built for operations.
Why score before your CRM
Filter low-quality and fake leads at the gate so you don’t pay to store or process noise—and so your team doesn’t waste time on them. CRM-agnostic lead validation.
- Early filtering — Score leads as they arrive (forms, webhooks, imports). Send only qualified leads into your CRM or call queue. Less storage, less manual triage, lower cost.
- No dependency on a CRM — Use LeadFlags in front of HubSpot, Salesforce, or any other system. You decide where the score goes.
- Explainable logic — Every score comes with flags (e.g. missing phone, disposable email). You can justify routing decisions to your team and clients.
What teams say
"We use LeadFlags for lead validation—filter inbound leads before they hit our CRM. Deterministic scoring, same criteria every time. Our agents spend more time on calls that convert and less on low-quality leads."
— Sales team lead, B2B SaaS
Pricing
Plans for teams with real volume. Choose monthly or annual—save 20% when you pay yearly. Pay for usage; get predictable scoring and full control.
Annual billing: −20% discount. Select billing in each card; one click opens PayPal in a popup to complete your subscription.
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Starter
Small teams with regular lead flow
39 € / month
0.039 € per scored lead
- Up to 1,000 leads / month
- Full scoring and flags—no hidden limits
- Email support when you need it
- Production-ready from day one
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Growth
Teams running daily inbound or outbound
99 € / month
0.010 € per scored lead
- Up to 10,000 leads / month
- Priority processing when volume spikes
- Fast support so you stay unblocked
- Early access to new scoring logic
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Scale
High volume: agencies, call centers, lead sellers
249 € / month
0.005 € per scored lead
- Up to 50,000 leads / month
- Higher rate limits for peak load
- Priority support for routing and integration
- Basic SLA for availability
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Enterprise
Custom volume, security, and thresholds
100,000+ leads
- Dedicated SLA and support
- IP allowlist for security and compliance
- Custom score thresholds to match your process
- Custom billing and terms
CRM-agnostic. No lock-in.
LeadFlags is a CRM-agnostic lead quality scoring API. We don’t sell CRM or marketing automation. Deterministic scoring for sales operations and marketing operations: we return a score, quality level, flags, and recommended action. You decide how to use it.
Use it in front of any CRM, call center, or pipeline. Same input, same result. For teams that need to score thousands of inbound leads a month reliably—deterministic scoring, no drift—LeadFlags provides a stable contract your operations can rely on.
Lead scoring API
One endpoint. Deterministic scoring: same input, same result—so your sales and marketing operations integrations stay predictable. Integrate in under 30 minutes.
POST /api/score-lead
Accepts any JSON object. All fields are optional. Recognized fields: name, email, phone, company, job_title, industry, company_size, country, source, message. Unknown keys are returned in unrecognized_fields when present.
Geographic fields (country, geo) are used only for consistency checks (e.g. phone prefix vs country), never for profiling.
Example request
curl -X POST "https://leadflags.com/api/score-lead/" \
-H "Content-Type: application/json" \
-H "X-API-Key: YOUR_API_KEY" \
-d '{"name":"Alex","email":"alex@fastgrowth-labs.co","phone":"+44 7700 900123","company":"FastGrowth Labs","job_title":"Consultant","industry":"Growth Consulting","company_size":"1-10","country":"UK","source":"facebook_ads","message":"Hi, looking for more info."}'Response
{
"score": 73,
"quality": "high",
"risk_flags": [
"random_name"
],
"positive_signals": [
"quality_message",
"business_domain_detected"
],
"recommended_action": "standard_priority"
}Quality: strong | high | medium | low. Recommended action: high_priority | standard_priority | review | discard. risk_flags explain deductions; positive_signals indicate trust signals. Custom thresholds: ?mid=70&low=40.
Stop wasting sales time on low-quality leads.
Test a real lead from your pipeline.
See instantly if you're wasting sales time.
What you'll get
- Quality score (0–100)
- Risk classification
- Top trust signals detected
See instantly if this lead is worth your sales team's time.
{}
Why agencies use LeadFlags
Reduce wasted sales calls
Automatically filter fake and disposable leads before they reach your CRM.
Prioritize high-intent prospects
Focus your sales team on leads with real conversion potential.
Deterministic scoring
Same input, same result. No AI drift. Full predictability.
If 30% of your leads are junk,
and each sales rep costs €2,000/month,
you're burning time and budget every day.
LeadFlags filters that before it hits your CRM.
Frequently asked questions
What does the score mean?
The score is 0–100. Higher means the lead meets more of our quality criteria (valid contact data, real-looking name, non-disposable email, etc.). We also return a quality level (strong / high / medium / low) and a recommended action (high_priority, standard_priority, review, discard). You use these to route and prioritize in your CRM or workflow.
What is a flag?
We return risk_flags (signals that reduced the score, e.g. missing phone, disposable email) and positive_signals (trust signals like business email, consistent identity). These make the score explainable so you can justify routing decisions to your team or clients.
Why not just use AI?
Deterministic scoring: same input, same result. Running a lead pipeline at scale needs consistency so routing and integrations don’t change from day to day. LeadFlags uses fixed rules. No drift, no prompts—built for sales operations and marketing operations.
Do I need to change my CRM?
No. LeadFlags is a CRM-agnostic lead scoring API. You call it before your CRM or call queue for lead validation. Send lead data, get a score, flags, and recommended action, then decide where the lead goes. Use it with any CRM or workflow.
Get in touch
Request a product demo or send us a general enquiry.