Top Free Identity Resolution Software

Senzing

The Senzing® SDK makes it easy for developers to add the world’s most advanced entity resolution with relationship awareness to their enterprise systems. Run the Senzing SDK on-prem or in the cloud. It comes pre-tuned and pre-trained and actively learns to deliver highly accurate results immediately.

Average Rating: 4.9/5.0

Total Reviews: 25

Treasure Data Customer Data Platform

Treasure AI moves marketing and data teams beyond legacy martech SaaS toward autonomous, ROI-driven AI agents that operate continuously, while keeping the human in the loop. With built-in governance, Treasure AI is powered by an always-up-to-date understanding of each customer for AI to act on. The result is always-on marketing execution that compounds over time: smarter engagement, stronger retention, and measurable growth. Treasure AI’s agentic experience platform is available across web, mobile, and desktop — bringing your customer intelligence to every workflow, wherever your team works.

Average Rating: 4.5/5.0

Total Reviews: 158

Meiro

Meiro is customer data infrastructure that deploys wherever your data needs to live — on AWS, Azure, GCP, or on-premise in any country. No forced data egress. Your infrastructure, your rules. We turn fragmented customer data into real-time customer context that every team and every AI agent can trust. Meiro Pipes (CDI) — for data engineers and product teams. It captures behavioral events from every touchpoint, enriches them, and routes data to your warehouse, analytics stack, activation tools, and AI agents. More than 60M events are routinely processed daily for a single enterprise client. Built-in AI agents support schema mapping, pipeline debugging, and setup. Includes an MCP server and CLI for structured context access. Meiro Audiences (CDP) — for marketers, CRM teams, and growth operators. It provides a persistent single customer view, AI-powered segmentation, calculated attributes, and consent governance. Native adtech integrations include Meta CAPI, Google Ads, TikTok, and The Trade Desk. Audiences can also be queried by AI agents in real time. Meiro Engage (CEP) — for hyper-personalization across email, push, SMS, WhatsApp, web banners, and paid media. It supports journey orchestration, conversion triggers, and agent-triggered actions, with no volume limits. All three products share one data layer, one identity graph, and one governance model — no middleware, no integration sprawl. Outcomes our clients deliver: +300% addressable audiences, +160% ROAS, 84% conversion uplift through personalization, and 60–80% cost savings versus legacy CDPs at scale. Warehouse-composable: Works natively with Snowflake, BigQuery, and Databricks — or runs fully standalone. You do not need a warehouse to get started. Bring one later, or not at all. Sovereign deployment: Deploy Meiro self-hosted on any cloud in any region, on-premise, or fully managed by us. Your AI agents access customer context inside your infrastructure — with no data export and no third-party model training on your data.

Average Rating: 4.7/5.0

Total Reviews: 82

FullContact

FullContact is a privacy-safe Identity Resolution company building trust between people and brands. We deliver the capabilities needed to create tailored customer experiences, improve ad targeting along with measurement as well as improve identity verification and fraud solutions by unifying data and applying insights in the moments that matter.

Average Rating: 4.3/5.0

Total Reviews: 100

Tilores

Tilores is the #1 data unification infrastructure to resolve fragmented data in real time - at unlimited scale

Average Rating: 4.7/5.0

Total Reviews: 30

CustomerLabs 1PD Ops Platform

CustomerLabs is a no-code First-Party Data Ops (1PD Ops) platform built for performance marketing teams who want to train ad platforms on first-party signals that actually drive business outcomes. Instead of letting Meta, Google, TikTok, and LinkedIn optimise for generic conversion noise, CustomerLabs unifies website, CRM, offline, and identity data into one operating layer, then sends optimisation-ready signals back to every growth platform across 200+ destinations. Trusted by 1000+ brands and agencies worldwide, CustomerLabs is privacy-first by design and built for e-commerce, lead generation, health & wellness, and agency teams. Why signal quality, not tracking, is the real problem Tracking is no longer the whole problem. Signal quality is. When website events, CRM stages, offline revenue, and identity data stay disconnected, ad platforms optimise against incomplete signals, and the cost shows up everywhere. Browser-only events leave platforms with weaker identity match quality and less reliable learning. Revenue quality, lifecycle stage, and offline outcomes never make it back to bidding platforms. CRM stages, offline sales, and qualified leads stay trapped in separate systems instead of improving campaign optimisation. The result: platforms chase cheap conversions instead of new customers, qualified pipelines, or high-value buyers. CustomerLabs stitches these scattered systems into one usable operating layer, so platforms learn from cleaner, richer feedback. The 1PD Ops Stack Collect & Resolve. Bring data in from your website, CRM, backend, webhooks, POS, and offline sources. Resolve identity into one profile per person across browser, CRM, and ad clicks. First-party domain tracking stores server-side cookies on your own domain, so identity persists beyond ITP and browser restrictions. Build & Sync. Build audiences segmented by lifecycle, value, CRM stage, and purchase behaviour. Route events and audiences to Meta, Google, LinkedIn, TikTok, and 200+ more destinations from one pipeline. Activate, Measure, & Govern. Auto-refresh audience membership across every platform in real time. Track offline conversions by sending CRM stages, in-store sales, and phone orders back as ad conversions. Fix CAPI and EMQ through identity enrichment, deduplication, and first-party domain delivery. Govern everything with encryption, consent management, regional hosting, and DPA, GDPR, HIPAA, and CCPA compliances. Key Features Server-Side Tracking & Conversions API (CAPI): Collect store purchase events and lead form submissions without loss, then sync them to Meta, Google Ads, TikTok, and LinkedIn from one server-side pipeline. First-party domain tracking preserves fbclid and gclid on your own domain so attribution and ROAS reporting stay accurate for stores and lead funnels. Identity Resolution: Map anonymous and known users into one unified profile across browser, CRM, and ad clicks, improving match rates and Event Match Quality (EMQ) for stronger algorithmic learning. Signal Engineering: Go beyond tracking. Not every purchase should train the algorithm the same way. Filter, enrich, and split raw events into curated outcome signals: new customers vs. returning buyers, high-AOV orders, qualified pipeline (MQL, SQL, and won stages), category purchases, and repeat buyers, so platforms optimize for the outcomes that actually matter. Session Enrichment for Algorithm Training: Algorithms learn in sequence. Enriched sessions with purchase events or CRM stage changes help Meta and Google understand shopper and lead behaviour before they convert. Audience Builder & Real-Time Activation: Segment by lifecycle, value, CRM stage, and purchase behaviour. Auto-refresh audience membership across every connected platform in real time, recovering stronger remarketing pools with cleaner identity and higher match rates. Offline Conversion Tracking: Send CRM stages, in-store sales, COD orders, and phone orders back into ad platform learning so the full business, not just web conversions, is visible to optimisation. Value-Based Bidding Signals: Send order value and revenue tiers with every purchase event so ad platforms bid for margin and high-value buyers, not low-AOV conversions. True Click Attribution & Funnel Analytics: Measure orders, revenue, and qualified pipeline by channel. Know which campaigns deserve more budget, not what platforms inflate in their own dashboards. Track which products turn views into purchases and which lead stages turn clicks into SQL and won deals. Privacy, Consent & Data Residency: Privacy-first by design with hashing, consent-aware collection, server-side delivery, and regional hosting across the EU (Frankfurt), US (Virginia), and APAC (Singapore). Compliant with GDPR, HIPAA, CCPA, and DPA, keeping signal flow durable even when platform restrictions break default setups. Outcomes You Can Train For CustomerLabs lets teams choose the outcome they want more of. Train campaigns on new buyers instead of every buyer in the same pool. Optimize for subscriber starts, renewals, and repeat value instead of one-time purchases. Push qualified CRM stages back into platforms so optimisation improves pipeline quality, not just form-fill volume. Send revenue tiers and basket value back so platforms bid toward the buyers that matter most. Recover stronger remarketing pools with cleaner identity and higher match rates. Use product and category signals to push spend toward higher-margin catalogue demand. Send store sales, COD, and closed revenue back into platform learning. Keep signal flow durable with consent-aware collection and tighter downstream control. Built For Your Stack DTC & Ecommerce: Separate new vs. returning customers; send value signals; and scale what matters, driving up to 86% new-customer purchases. Lead Gen & B2B: Push MQL, SQL, and won stages back so platforms find better leads instead of cheap form fills, improving the lead-to-opportunity ratio by 20%. Agencies: Manage signal quality, match rates, and outcomes across every client from one setup instead of rebuilding workflows per account. Offline & COD: Make invisible revenue visible to ads by sending store sales, COD, and POS conversions back to Meta and Google. Health & Wellness: Stay live through platform restrictions with consent-aware, privacy-safe signal delivery. One brand recovered a 9.3 EMQ score in under 24 hours after metadata restrictions. Multi-Platform Ecommerce: Unify Shopify, CRM, and POS into one signal layer so platforms learn from cleaner customer and revenue feedback. Proven Outcomes Smars, a leading jewellery brand, scaled campaigns to 86% new-customer purchases (212 of 247 conversions were net-new buyers) by training Meta and Google on first-time buyers instead of returning purchasers in the same conversion pool, using new-customer acquisition signals (NCAC). Fateh increased its lead-to-opportunity ratio by 20% by sending MQL, SQL, and won stages back to ad platforms so campaigns learnt from pipeline quality rather than raw form fills. Dundas Life slashed top-of-funnel lead costs by 60% by feeding lead-stage values into Google Enhanced Conversions, moving bidding toward deals won instead of cheap top-of-funnel leads. A personal wellness brand overcame Meta's data restrictions by recovering a 9.3 EMQ score through consent-aware hashing and first-party domain delivery, staying live when default setups broke. Other teams have controlled cost-per-purchase across multiple products by sending order value with every purchase event and improved retargeting performance while reducing cost-per-lead using cleaner first-party audiences. Across geos and verticals, brands report results like 95% event match, +3.8x ROAS, +62% new customers, 96% data accuracy, +55% audience reach, +2.8x ROAS, +40% attribution, +45% prepaid orders, and +3.2x customer LTV. Who Uses CustomerLabs CustomerLabs is trusted by performance teams at brands and agencies, including The Sleep Company, Mokobara, Snitch, The Good Bug, Goodbody Wellness, WPP, Dentsu, Rare Rabbit, and many more across 19+ industries, from e-commerce and lead generation to health and wellness and agency operations. Frequently Asked Questions Do I need a credit card to start? No. CustomerLabs offers a 14-day trial with no card upfront. Use cases are scoped before signup, so the trial period is purely for data audit, data ingestion, and activation. Where is my data stored? CustomerLabs offers regional hosting across the EU (Frankfurt), US (Virginia), and APAC (Singapore) to meet data residency requirements. Is CustomerLabs privacy-compliant? Yes. The platform is built to support GDPR, HIPAA, and CCPA compliance, with hashing, consent-aware collection, and server-side delivery. Most teams already have CAPI live. The real question is whether the platform is learning from the right purchase signal, and that is exactly what CustomerLabs Signal Engineering solves. CustomerLabs gives performance marketing teams one system for first-party data collection, identity resolution, and signal engineering, moving them from tracking fixes to true 1PD Ops.

Average Rating: 4.8/5.0

Total Reviews: 34

Hightouch

Hightouch is the leading data and Agentic Marketing Platform for modern marketing teams. Trusted by brands like Domino’s, Autotrader, cars.com, Superhuman (formerly Grammarly), and PetSmart, Hightouch helps marketers deliver personalized experiences, optimize performance, and move faster with data and AI. With Hightouch, business users can drive revenue, grow brand awareness, and maximize ROI without relying on engineering. Hightouch’s Composable Customer Data Platform (CDP), named a Leader in the 2026 Gartner® Magic Quadrant™ for Customer Data Platforms, collects behavioral data, resolves identities into unified Customer 360 profiles, builds audiences, syncs to 300+ destinations (including leading ad platforms), and measures campaign impact—directly from your cloud data warehouse. On top of this foundation, Hightouch’s Agentic Marketing Platform uses your complete data and all of the context from your marketing and advertising tools to power true end-to-end lifecycle and performance marketing across paid and owned channels. Purpose-built agents help you go from analyzing campaign performance, to ideating new campaigns, to generating creative, to building segments and cross-channel journeys, to activating audiences and optimization signals back into your ad platforms and downstream tools—often in minutes instead of weeks. Hightouch is built for security, compliance, and scale. Your data stays in your environment—Hightouch never becomes a system of record—and the platform meets SOC 2 Type II, HIPAA, ISO-27001, GDPR, CCPA, and Privacy Shield standards, so even the most regulated organizations can confidently use customer data to power marketing. This approach gives global teams a single, trusted foundation for activation while preserving strong governance, clear audit trails, and regional data residency requirements.

Average Rating: 4.6/5.0

Total Reviews: 405

Retention.com

10x Your Email List with Retention.com 95% of visitors leave your website without ever filling out a form.That's not just lost traffic, it's lost revenue sitting that you wouldn't be able to reach. Until now. Retention.com identifies up to 40% of your anonymous website visitors and delivers verified, deliverable email addresses straight to your email provider, even if the contact never fills out a form, subscribes to a pop-up, or creates an account. That means the shoppers who browsed your best sellers, added items to their cart, or spent time on your landing pages can now enter your email flows automatically. No more relying solely on opt-in forms and discount pop-ups to grow your list. Retention.com works alongside your existing acquisition strategy to unlock a massive pool of contacts you were previously invisible to. The result is faster list growth, higher-intent audiences, and more revenue per send. Getting started is simple. Retention.com integrates directly with your existing email platform, so new contacts flow into your welcome series, abandonment sequences, and promotional campaigns from day one. There's no complex setup, no engineering resources required, and no disruption to your current workflows. Trusted by 1,500+ brands including Manscaped, Living Spaces, Spanx, and Mejuri, Retention.com is the fastest way to scale your email list with real, marketable contacts. If you're serious about email list growth, stop leaving subscribers on the table and start turning your anonymous traffic into your most profitable channel.

Average Rating: 4.5/5.0

Total Reviews: 121

LeadPost

LeadPost enables B2B and B2C marketers to turn more of their website visitors into customers. It works by sending up to 40% of your anonymous website visitors right to your CRM – even if they don't fill out a form! Then, you can retarget those high-intent leads with email, direct mail, and other marketing campaigns to increase sales.

Average Rating: 4.8/5.0

Total Reviews: 23

Lytics

Lytics is a premier customer data platform for Google Cloud customers and 100% Google Cloud-native CDP. Lytics CDP offers a composable and modern architecture that fits with and accelerates your cloud data strategy. Integrated with existing cloud data warehouses, Lytics helps companies build a unified first-party data foundation, resolving identities to construct and maintain comprehensive profiles that are compliant, extensible, and accessible. Lytics connects to a robust ecosystem for third-party enrichment and activation using reverse ETL, generative AI, and the most comprehensive set of real-time connections into DSPs and action systems in the industry. Lytics unique approach enables brands to work without silos from a reliable source of truth, reimagining how they leverage their own customer data to increase customer engagement and boost ROI, empowering business users with the insights and tools they need to drive action while enabling compliance with global consumer data residency and privacy regulations.

Average Rating: 3.9/5.0

Total Reviews: 67

AtData

AtData's flagship email verification service, SafeToSend, leads the industry in accuracy, security, speed, and ease of use to provide comprehensive email data hygiene and protection against costly, problematic addresses. SafeToSend will confirm the email address is valid by determining if not only the syntax is correct but also if the address meets ISP-specific requirements. We will fix typos, formatting, syntax and other input errors while weeding out damaging addresses to alleviate risk and save your sender reputation. We also provide an engagement score that examines activity signals to identify actively used emails for improved deliverability, better segmentation, and qualifying leads. Our 100% SafeToSend guarantee gives your the peace of mind that your emails are validated, corrected, and safe so your messaging gets to the right audience on the right channel. The results are higher response rates, conversion and profits. Getting started is easy. We make it simple to clean your data through our self-service portal, InstantData. Create a free account and either select your email list from your local device, upload it via FTP or import it from your email marketing platform.

Average Rating: 4.4/5.0

Total Reviews: 26

Delivr.ai

Delivr.ai transforms anonymous website visitors into identified people and companies in real time. Our deterministic identity resolution delivers 50%+ match rates, 2x industry standard, with verified data and person-level intent signals across 22,000+ topics. No cookies. No guessing.

Average Rating: 3.8/5.0

Total Reviews: 2

Black Crow AI

Black Crow AI is a Shopify app that predicts shopping behavior patterns to efficiently acquire and reach more customers across digital marketing channels. We empower e-commerce brand growth by unlocking the hidden value in the customer data you already own.

Average Rating: 4.8/5.0

Total Reviews: 12

PMG360 AudienceIQ

AudienceIQ is PMG360’s audience intelligence platform built to help marketing, sales, demand generation, and revenue teams identify the right companies and decision makers for every campaign. Instead of relying on broad lists or generic targeting, AudienceIQ gives teams a structured way to define, analyze, refine, and activate audiences that closely match their Ideal Customer Profile. The platform supports a more disciplined approach to audience development by combining firmographic criteria, role-based targeting, geographic filters, company attributes, and relevant intent signals into one repeatable workflow. With AudienceIQ, users can begin by translating campaign goals into clear audience requirements. A team may want to reach enterprise technology buyers in a specific region, healthcare executives researching a particular solution area, or mid-market companies that fit a defined revenue and employee-size range. AudienceIQ helps organize those requirements into audiences that are easier to evaluate, save, reuse, and improve over time. This makes the platform useful not only for one-time campaign execution, but also for building a stronger long-term audience strategy. The value of AudienceIQ is strongest when teams use it to align marketing and sales around a shared definition of the best-fit customer. By reviewing audience size, company fit, decision-maker relevance, intent, and campaign objective, users can reduce wasted effort and focus resources on accounts that are more likely to matter. AudienceIQ also encourages ongoing refinement. As campaigns run, teams can compare results, update filters, remove poor-fit segments, and maintain a library of approved audiences for recurring programs. AudienceIQ is designed to be practical for day-to-day users, not just technical specialists. Marketers can use it to support segmentation and campaign planning, sales teams can use it to focus outreach, and customer success or agency partners can use it to support account-based programs. Depending on an organization’s configuration, audiences may also be exported or connected to approved systems such as CRM, marketing automation, advertising platforms, or CSV-based workflows. In all cases, AudienceIQ helps teams move from broad assumptions to more precise, data-informed audience decisions. Overall, AudienceIQ gives organizations a consistent foundation for audience planning, validation, and activation. It helps ensure that every campaign starts with a clearly defined target, that stakeholders share the same understanding of who they are trying to reach, and that audience decisions can be reviewed and improved over time. The result is a more focused campaign process, better alignment across teams, and a stronger connection between audience strategy and business outcomes.

wehave

One platform to run sponsorship, hospitality and B2B ticketing. wehave is the all-in-one platform built specifically for sports sponsorship and partnership teams, not a generic CRM or spreadsheet stretched to fit sports. It brings pipeline, contracts, rights tracking, hospitality, ticketing, reporting, and partner portals into one connected workspace. Commercial teams use wehave to stop losing rights in spreadsheets, automate guest lists and matchday check-in (no more WhatsApp/email chains), generate branded activation reports automatically, and give every partner a real-time portal of their own rights and deliverables. Coach Vic, wehave's AI commercial director, helps set up workspaces, drafts assets, and answers questions along the way. Trusted by 50+ clubs across Europe including Royal Antwerp FC, Standard de Liege, Tomorrowland, PSV and Feyenoord,

Average Rating: 4.5/5.0

Total Reviews: 1