A unified API to ingest, filter, and deliver your lead data to your CRM or marketing platforms in real-time. Built for developers, scaled for enterprise.
Core Infrastructure
Reliable, scalable tools designed for high-throughput data pipelines. We handle the complexity so you can focus on the logic.
Ingest massive datasets instantly via REST API or bulk CSV uploads with 99.9% uptime.
Route leads based on complex JSON logic, geography, time-of-day, or vendor caps.
Ensure data integrity at the source with real-time schema validation and format checks.
SOC 2 Type II compliant. Enterprise-grade encryption at rest and in transit.
Detailed insights into your data flow, acceptance rates, and API latency metrics.
Scale your usage as you grow with usage-based pricing. No massive upfront contracts.
Our hygiene engine runs in real-time before data ever hits your CRM. Filter out bad actors, duplicates, and non-compliant leads automatically.
Predictable pricing for every stage
Simple monthly fees based on record volume. No hidden setup costs.
Perfect for small teams and validation.
$14 /month
For growing businesses scaling up.
$47 /month
High volume processing power.
$97 /month
Developing something small? Try our Free plan for up to 500 records/month.
Frequently Asked Questions
Technical details about security, limits, and billing structure.
We use AES-256 encryption for data at rest in our databases and TLS 1.3 for all data in transit. Encryption keys are managed via AWS KMS with strict access rotation policies. Our infrastructure is SOC 2 Type II compliant and undergoes regular penetration testing.
Rate limits depend on your plan tier. The Starter plan includes 10 requests/second. The Pro plan supports up to 50 requests/second with burst capacity. Scale plans allow up to 200 requests/second. Custom enterprise limits are available for high-throughput pipelines. Headers are returned with every request indicating remaining quota.
We don't throttle your traffic if you exceed your monthly record limit. Instead, overages are calculated at the end of your billing cycle based on the specific per-lead rate of your plan (e.g., $0.001/lead on Pro). You can configure hard caps in the dashboard to prevent accidental overages.
Currently, ListHelix is a fully managed cloud service to ensure maximum uptime and security. However, for Enterprise clients, we offer VPC peering and dedicated isolated instances within our infrastructure to meet specific compliance requirements.
Yes. While we provide standard validators (phone, email, address), you can write custom logic using our JSON-based rule engine. For more complex requirements, you can hook into external validation services via webhooks before the lead is accepted.
Can't find the answer you're looking for? Our documentation is comprehensive, or you can chat with our support team.