Headless Data Enrichment

Connect. Enrich With AI.
Your Data, Only Better

List+ is the headless enrichment platform: an API for developers, with a UI for teams. Plug in SaaS tools, databases, or upload a list — AI deduplicates, enriches, and writes back automatically.

AI-Powered Enrichment, Built for Developers

Transform raw data into actionable insights with one-click AI enrichment. From email validation to company research, ListPlus intelligently fills gaps in your data using state-of-the-art AI models and real-time web data.

Smart Column Detection & Auto-Enrichment

Real-time API Integration

Natural Language Commands

Automated Workflows, Zero Manual Work

Build powerful data processing workflows once and run them infinitely. From simple validations to complex multi-step enrichments, automate your entire data pipeline with our visual workflow builder.

Visual Workflow Builder

Scheduled Execution

Version Control & Rollback

Effortless Data Cleaning & Standardization

Stop wasting hours on manual data cleanup.

Our intelligent algorithms automatically detect and fix inconsistencies, standardize formats, and validate entries across millions of rows in seconds.

Automatic Format Detection

Intelligently recognizes phone numbers, addresses, dates, and more—then standardizes them to your preferred format instantly.

Duplicate Detection & Merge

Advanced fuzzy matching identifies near-duplicates and intelligently merges records while preserving the most complete information.

Connect via OAuth, Automate Everything

Direct OAuth connections to your favorite SaaS tools. Pull customer data from Stripe, enrich leads from LinkedIn, sync with your CRM—all without writing a single line of code.

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Benefits

Why Developers Choose ListPlus

Process Millions of Rows in Seconds

Built for scale with streaming architecture and intelligent caching.

API-First Architecture

REST APIs for everything. Integrate with your CI/CD pipeline effortlessly.

Privacy-First Design

Your data never leaves your infrastructure. Self-host or use our secure cloud.

Git-Like Version Control

Track changes, revert mistakes, and collaborate without data conflicts.

Smart Type Detection

AI automatically detects and validates emails, phone numbers, addresses, and more.

Infinite Scalability

From 100 to 10 million rows—performance stays consistent.

Frequently asked questions

Is my data sent to ChatGPT or other AI services?

No, never! Your data never leaves our secure environment. We only send commands like "validate email format" to AI, not your actual data. The AI provides us with processing rules that we then apply locally to your data.

How does AI processing work without seeing my data?

We analyze your data structure (columns, patterns) in our secure storage. Then we ask AI for processing rules (e.g., "How do I validate email formats?"). The AI responds with rules that we apply to your data - without the AI ever seeing your actual data.

Is my data used for training AI models?

Never! We have enterprise agreements with all AI providers that explicitly prohibit training. Moreover, your data never even reaches AI services since we only send commands.

What can List+ do with my data?

List+ offers intelligent data processing: Automatic cleaning (remove duplicates, standardize formats), AI-powered validation (emails, phone numbers, addresses), data enrichment (fill missing information), and much more - all without sending your data to external AI services.

What are workflows and how do they work?

Workflows are automated data processing pipelines you can create yourself. For example: "Clean all email addresses → Remove duplicates → Standardize company names → Export as CSV". Once created, you can apply these workflows repeatedly to new data.

Can I connect List+ with my existing tools?

Yes! List+ supports MCP (Model Context Protocol) servers, allowing you to process data directly from your existing systems like CRM, ERP, or databases. Data is temporarily processed in our secure storage and then written back to your system.

What data sources can I use?

List+ supports various formats and sources: CSV, Excel, JSON files, direct API connections to CRM systems (HubSpot, Salesforce), databases via MCP servers, and manual data entry. You can simply upload files via drag & drop.

How large can the datasets be that I process?

List+ is optimized for large datasets. We easily process tables with over 100,000 rows. Thanks to our memory-only architecture and optimized hash storage, even large datasets remain lightning fast to work with.

What specific problems does List+ solve?

Common use cases: Clean email lists (remove invalid addresses), standardize customer data (uniform spelling), intelligently merge duplicates, lead scoring and categorization, compliance checks (identify GDPR-compliant data), and improve data quality.

Can I use List+ for real-time data processing?

Yes! Through our API, you can process data in real-time. For example: New leads from your CRM are automatically validated, enriched, and categorized before being written back to your system - all within seconds.

Where is my data stored during processing?

Exclusively in memory (Redis RAM) - never on hard drives! After a maximum of 1 hour, data is automatically deleted from memory. For persistent lists, you can optionally use our encrypted blob storage.

Does List+ meet GDPR requirements?

Yes, completely! Right to be forgotten (automatic deletion), data minimization, clear purpose limitation, security by design with encryption, and complete audit logs are implemented. We are SOC 2 Type II compliant.

Can I try List+ for free?

Yes! You can try List+ without registration. Create up to 3 lists and test all basic features. For advanced features like AI processing, workflows, and API access, free registration is required.

What makes List+ different from Excel or Google Sheets?

List+ is specifically designed for AI-powered data processing: Smart data cleaning instead of manual formulas, automatic workflows instead of copy-paste, secure processing of sensitive data, API integration for automated processes, and team collaboration with granular permissions.

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