# What pairs well with Referral Rock > Referral Rock is a referrals tool, and a team running it still has 6 neighbouring categories to staff. The pick in each is Creem for subscription billing, Sender for email service providers, Carrd for landing page builders, Umami for GTM analytics, Judge.me for testimonials & social proof and Collabstr for influencer & creator marketing, each the leading tool in that category on published criteria. - Profile: https://saastracker.org/products/referral-rock - Category: Affiliate & Referral Programs (https://saastracker.org/categories/affiliate-referral) - Web version: https://saastracker.org/products/referral-rock/stack ## The stack, category by category | Category | Ideal pairing | Because | Benefit | | --- | --- | --- | --- | | Subscription Billing | [Creem](https://saastracker.org/products/creem) (Best Value) | Referral Rock lists no monthly and annual toggle on the pricing page among its limits. Creem adds affiliate programs with automatic commission splits and revenue splits between partners. | Recurring revenue bills, retries and reconciles itself, including the tax nobody wants to calculate. | | Email Service Providers | [Sender](https://saastracker.org/products/sender) (Best Value) | Referral Rock is built for referrals, not ESPs. Sender adds SMS and email combined inside a single automation flow rather. | An opt-in audience is owned rather than rented, and reaching it costs nothing per send. | | Landing Page Builders | [Carrd](https://saastracker.org/products/carrd) (Best Value) | Referral Rock sends buyers elsewhere for a published SOC 2 or ISO 27001 attestation. Carrd adds maintained despite the tiny team. | A campaign page ships the same afternoon without waiting on an engineer. | | GTM Analytics | [Umami](https://saastracker.org/products/umami) (Best Value) | Referral Rock is built for referrals, not analytics. Umami adds retention analysis and user journeys. | Spend gets attributed to revenue, so the channel that works is the one that gets funded. | | Testimonials & Social Proof | [Judge.me](https://saastracker.org/products/judge-me) (Best Value) | Referral Rock lists extra programs cost $100 a month each on the Operator Plan among its limits. Judge.me adds a single flat $15 paid plan at any order volume. | Real customer proof sits on the pages where people decide, not only on a review site. | | Influencer & Creator Marketing | [Collabstr](https://saastracker.org/products/collabstr) (Ease of Use) | Referral Rock lists only one self-serve plan among its limits. Collabstr adds you can hire for real on the free plan. | Creators get found, briefed and paid on performance, rather than on a flat fee and hope. | ### Creem for Subscription Billing Referral Rock lists no monthly and annual toggle on the pricing page among its limits. Creem adds affiliate programs with automatic commission splits and revenue splits between partners. Recurring revenue bills, retries and reconciles itself, including the tax nobody wants to calculate. Global tax collection and remittance covering more than 50 countries with handling described across 190-plus territories, which is the whole reason to use a merchant of record and it is not compromised by the low rate. Paddle holds Category Leader here, and is worth weighing if that is closer to the problem Referral Rock leaves open. ### Sender for Email Service Providers Referral Rock is built for referrals, not ESPs. Sender adds SMS and email combined inside a single automation flow rather. An opt-in audience is owned rather than rented, and reaching it costs nothing per send. The most generous free tier in the category: 2,500 subscribers and 15,000 emails a month with automation, landing pages, and popups intact rather than stripped out. Mailchimp holds Category Leader here, and is worth weighing if that is closer to the problem Referral Rock leaves open. ### Carrd for Landing Page Builders Referral Rock sends buyers elsewhere for a published SOC 2 or ISO 27001 attestation. Carrd adds maintained despite the tiny team. A campaign page ships the same afternoon without waiting on an engineer. Price and metering model are structurally different from the rest of the category: $19 a year for ten sites, with no per-visitor or per-pageview charge to fear when a page succeeds. Unbounce holds Category Leader here, and is worth weighing if that is closer to the problem Referral Rock leaves open. ### Umami for GTM Analytics Referral Rock is built for referrals, not analytics. Umami adds retention analysis and user journeys. Spend gets attributed to revenue, so the channel that works is the one that gets funded. On a self-hosted instance your data sits in your own PostgreSQL, queryable with SQL and retained forever, which no managed competitor can match on ownership. Google Analytics 4 holds Category Leader here, and is worth weighing if that is closer to the problem Referral Rock leaves open. ### Judge.me for Testimonials & Social Proof Referral Rock lists extra programs cost $100 a month each on the Operator Plan among its limits. Judge.me adds a single flat $15 paid plan at any order volume. Real customer proof sits on the pages where people decide, not only on a review site. 24/7 support offered on both plans including free, which is unusual at any price and remarkable at zero. Trustpilot holds Category Leader here, and is worth weighing if that is closer to the problem Referral Rock leaves open. ### Collabstr for Influencer & Creator Marketing Referral Rock lists only one self-serve plan among its limits. Collabstr adds you can hire for real on the free plan. Creators get found, briefed and paid on performance, rather than on a flat fee and hope. Published creator pricing removes the rate negotiation that stalls most first influencer campaigns, and makes budgeting possible before any conversation happens. ## FAQ ### What is the best stack to run with Referral Rock? Referral Rock is a referrals tool, and a team running it still has 6 neighbouring categories to staff. The pick in each is Creem for subscription billing, Sender for email service providers, Carrd for landing page builders, Umami for GTM analytics, Judge.me for testimonials & social proof and Collabstr for influencer & creator marketing, each the leading tool in that category on published criteria. ### What do I pair with Referral Rock for Subscription Billing? Creem. Referral Rock lists no monthly and annual toggle on the pricing page among its limits. Creem adds affiliate programs with automatic commission splits and revenue splits between partners. Recurring revenue bills, retries and reconciles itself, including the tax nobody wants to calculate. ### How many tools do I need alongside Referral Rock? Referral Rock sits next to 6 other categories in a working referrals 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 Collabstr worth adding alongside Referral Rock? Referral Rock lists only one self-serve plan among its limits. Collabstr adds you can hire for real on the free plan. Creators get found, briefed and paid on performance, rather than on a flat fee and hope. --- 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.