# What pairs well with RB2B > RB2B is a visitor ID tool, and a team running it still has 7 neighbouring categories to staff. The pick in each is HubSpot CRM for sales CRM, Instantly for cold email outreach, Crunchbase for buying signals & intent, Google Analytics 4 for GTM analytics, Apollo.io for B2B data providers, HubSpot Marketing Hub for marketing automation and Optmyzr for paid ads management, each the leading tool in that category on published criteria. - Profile: https://saastracker.org/products/rb2b - Category: Website Visitor Identification (https://saastracker.org/categories/visitor-identification) - Web version: https://saastracker.org/products/rb2b/stack ## The stack, category by category | Category | Ideal pairing | Because | Benefit | | --- | --- | --- | --- | | Sales CRM | [HubSpot CRM](https://saastracker.org/products/hubspot-crm) (Category Leader) | RB2B is built for visitor ID, not CRM. HubSpot CRM adds strongest free tier in the category by a wide margin. | Every conversation ends up on a record, so a rep leaving does not take the pipeline with them. | | Cold Email Outreach | [Instantly](https://saastracker.org/products/instantly) (Category Leader) | RB2B sends buyers elsewhere for intent scoring, account research, and multichannel execution in one platform. Instantly adds unlimited accounts + free warm-up on every tier. | Outreach goes out on a schedule and replies land in one place instead of a personal inbox. | | Buying Signals & Intent | [Crunchbase](https://saastracker.org/products/crunchbase) (Category Leader) | RB2B lists the founder rebuilt the product once already after declaring the first among its limits. Crunchbase adds saved searches and alerts. | Outreach lands while a company is actually looking, rather than on a random Tuesday. | | GTM Analytics | [Google Analytics 4](https://saastracker.org/products/google-analytics) (Category Leader) | RB2B lists match rates are a share of traffic among its limits. Google Analytics 4 adds data-driven attribution across Google and non-Google channels. | Spend gets attributed to revenue, so the channel that works is the one that gets funded. | | B2B Data Providers | [Apollo.io](https://saastracker.org/products/apollo) (Category Leader) | RB2B is built for visitor ID, not data. Apollo.io adds free tier and transparent pricing. | Lists get built in minutes from filters, rather than bought, scraped, or typed out by hand. | | Marketing Automation | [HubSpot Marketing Hub](https://saastracker.org/products/hubspot-marketing-hub) (Category Leader) | RB2B lists it generates a stream of false positives by construction among its limits. HubSpot Marketing Hub adds reporting and multi-touch attribution. | Follow-up fires off behaviour rather than a calendar, so nobody is chased at the wrong moment. | | Paid Ads Management | [Optmyzr](https://saastracker.org/products/optmyzr) (Category Leader) | RB2B is built for visitor ID, not paid ads. Optmyzr adds deepest feature set in this category by a wide margin. | Budget moves to what converts without somebody logging into three ad platforms every morning. | ### HubSpot CRM for Sales CRM RB2B is built for visitor ID, not CRM. HubSpot CRM adds strongest free tier in the category by a wide margin. Every conversation ends up on a record, so a rep leaving does not take the pipeline with them. Free unlimited view-only seats mean the whole company can read the CRM without licence sprawl, which few competitors offer. Zoho CRM holds Best Value in the same category, and is the swap to make when the budget matters more than the ceiling. ### Instantly for Cold Email Outreach RB2B sends buyers elsewhere for intent scoring, account research, and multichannel execution in one platform. Instantly adds unlimited accounts + free warm-up on every tier. Outreach goes out on a schedule and replies land in one place instead of a personal inbox. Unibox is the best reply-triage surface in the category for operators running many mailboxes. Smartlead holds Best Value in the same category, and is the swap to make when the budget matters more than the ceiling. ### Crunchbase for Buying Signals & Intent RB2B lists the founder rebuilt the product once already after declaring the first among its limits. Crunchbase adds saved searches and alerts. Outreach lands while a company is actually looking, rather than on a random Tuesday. Multi-source assembly across community contributions, licensed feeds, over a thousand public sources, and an in-house data team produces better coverage than any single method. Trigify holds Best Value in the same category, and is the swap to make when the budget matters more than the ceiling. ### Google Analytics 4 for GTM Analytics RB2B lists match rates are a share of traffic among its limits. Google Analytics 4 adds data-driven attribution across Google and non-Google channels. Spend gets attributed to revenue, so the channel that works is the one that gets funded. Free at unlimited traffic volume, which no privacy-first competitor can match once a site passes a few hundred thousand pageviews a month. Umami holds Best Value in the same category, and is the swap to make when the budget matters more than the ceiling. ### Apollo.io for B2B Data Providers RB2B is built for visitor ID, not data. Apollo.io adds free tier and transparent pricing. Lists get built in minutes from filters, rather than bought, scraped, or typed out by hand. Data + engagement in one product removes the export/import loop entirely. Lusha holds Best Value in the same category, and is the swap to make when the budget matters more than the ceiling. ### HubSpot Marketing Hub for Marketing Automation RB2B lists it generates a stream of false positives by construction among its limits. HubSpot Marketing Hub adds reporting and multi-touch attribution. Follow-up fires off behaviour rather than a calendar, so nobody is chased at the wrong moment. Marketing-contact billing lets you store a very large database while only paying for the people you actually message, which is a more humane meter than pure list-size pricing. EngageBay holds Best Value in the same category, and is the swap to make when the budget matters more than the ceiling. ### Optmyzr for Paid Ads Management RB2B is built for visitor ID, not paid ads. Optmyzr adds deepest feature set in this category by a wide margin. Budget moves to what converts without somebody logging into three ad platforms every morning. Real unattended automation through the Rule Engine and Campaign Automator, with preview before execution and AI-generated explanations of what a rule will do. Bïrch (formerly Revealbot) holds Best Value in the same category, and is the swap to make when the budget matters more than the ceiling. ## FAQ ### What is the best stack to run with RB2B? RB2B is a visitor ID tool, and a team running it still has 7 neighbouring categories to staff. The pick in each is HubSpot CRM for sales CRM, Instantly for cold email outreach, Crunchbase for buying signals & intent, Google Analytics 4 for GTM analytics, Apollo.io for B2B data providers, HubSpot Marketing Hub for marketing automation and Optmyzr for paid ads management, each the leading tool in that category on published criteria. ### What do I pair with RB2B for Sales CRM? HubSpot CRM. RB2B is built for visitor ID, not CRM. HubSpot CRM adds strongest free tier in the category by a wide margin. Every conversation ends up on a record, so a rep leaving does not take the pipeline with them. ### How many tools do I need alongside RB2B? RB2B sits next to 7 other categories in a working visitor ID stack, and its own profile names the gap each one fills. Most teams staff the first two or three and add the rest as the motion grows. ### Is Optmyzr worth adding alongside RB2B? RB2B is built for visitor ID, not paid ads. Optmyzr adds deepest feature set in this category by a wide margin. Budget moves to what converts without somebody logging into three ad platforms every morning. --- Source: SaaSTracker (https://saastracker.org), an independent editorial project. Pairings are the leading tool in each complementary category, chosen on published criteria: https://saastracker.org/methodology. Placement cannot be purchased.