# What pairs well with Walnut > Walnut is a onboarding tool, and a team running it still has 6 neighbouring categories to staff. The pick in each is Kissmetrics for product analytics & session replay, Plain for customer support platforms, Churnkey for retention & churn prevention, SuprSend for notification infrastructure, Skool for community platforms and Polar for subscription billing, each the leading tool in that category on published criteria. - Profile: https://saastracker.org/products/walnut - Category: Product Onboarding & PLG (https://saastracker.org/categories/product-onboarding) - Web version: https://saastracker.org/products/walnut/stack ## The stack, category by category | Category | Ideal pairing | Because | Benefit | | --- | --- | --- | --- | | Product Analytics & Session Replay | [Kissmetrics](https://saastracker.org/products/kissmetrics) (Momentum) | Walnut lists it does nothing for signed-up users inside your product among its limits. Kissmetrics adds a free tier with real. | Feature usage and drop-off are measurable, so a roadmap argument can end with evidence. | | Customer Support Platforms | [Plain](https://saastracker.org/products/plain) (Momentum) | Walnut is built for onboarding, not support. Plain adds unlimited free viewer seats. | Questions arrive in one queue with a history attached, instead of scattered across personal inboxes. | | Retention & Churn Prevention | [Churnkey](https://saastracker.org/products/churnkey) (Momentum) | Walnut is built for onboarding, not retention. Churnkey adds flat pricing with no percentage of recovered revenue. | Accounts at risk surface while there is still time to call, rather than at renewal. | | Notification Infrastructure | [SuprSend](https://saastracker.org/products/suprsend) (Momentum) | Walnut is built for onboarding, not notifications. SuprSend adds enterprise self-hosting and Bring Your Own Cloud. | Product events reach people on the channel they actually read, without building a sender for each one. | | Community Platforms | [Skool](https://saastracker.org/products/skool) (Momentum) | Walnut is built for onboarding, not community. Skool adds $9 Hobby plan. | Customers answer each other in a space the company owns, rather than in a chat nobody can search. | | Subscription Billing | [Polar](https://saastracker.org/products/polar) (Momentum) | Walnut is built for onboarding, not billing. Polar adds best-in-category developer experience. | Recurring revenue bills, retries and reconciles itself, including the tax nobody wants to calculate. | ### Kissmetrics for Product Analytics & Session Replay Walnut lists it does nothing for signed-up users inside your product among its limits. Kissmetrics adds a free tier with real. Feature usage and drop-off are measurable, so a roadmap argument can end with evidence. Transparent published per-event pricing with a falling unit rate, no quote required until 5 million events a month. Amplitude holds Category Leader here, and is worth weighing if that is closer to the problem Walnut leaves open. ### Plain for Customer Support Platforms Walnut is built for onboarding, not support. Plain adds unlimited free viewer seats. Questions arrive in one queue with a history attached, instead of scattered across personal inboxes. Slack, Teams, and Discord are treated as genuine support channels with assignment, status, and SLA tracking, which no general-purpose help desk in this set does properly. Help Scout holds Category Leader here, and is worth weighing if that is closer to the problem Walnut leaves open. ### Churnkey for Retention & Churn Prevention Walnut is built for onboarding, not retention. Churnkey adds flat pricing with no percentage of recovered revenue. Accounts at risk surface while there is still time to call, rather than at renewal. Cancel flows execute billing changes themselves, so adding a pause offer does not require your engineers to build pause logic in Stripe. Paddle Retain holds Category Leader here, and is worth weighing if that is closer to the problem Walnut leaves open. ### SuprSend for Notification Infrastructure Walnut is built for onboarding, not notifications. SuprSend adds enterprise self-hosting and Bring Your Own Cloud. Product events reach people on the channel they actually read, without building a sender for each one. Bring your own delivery vendors means you keep your sending reputation, your existing provider contracts, and your per-message pricing, and the platform fee is honestly separated from delivery cost. Knock holds Category Leader here, and is worth weighing if that is closer to the problem Walnut leaves open. ### Skool for Community Platforms Walnut is built for onboarding, not community. Skool adds $9 Hobby plan. Customers answer each other in a space the company owns, rather than in a chat nobody can search. Fastest time to a live paid community of anything in this category. Circle holds Category Leader here, and is worth weighing if that is closer to the problem Walnut leaves open. ### Polar for Subscription Billing Walnut is built for onboarding, not billing. Polar adds best-in-category developer experience. Recurring revenue bills, retries and reconciles itself, including the tax nobody wants to calculate. Merchant of record coverage across more than 100 markets removes VAT registration and filing entirely, at a lower rate than the incumbent merchant of record vendors charge. Paddle holds Category Leader here, and is worth weighing if that is closer to the problem Walnut leaves open. ## FAQ ### What is the best stack to run with Walnut? Walnut is a onboarding tool, and a team running it still has 6 neighbouring categories to staff. The pick in each is Kissmetrics for product analytics & session replay, Plain for customer support platforms, Churnkey for retention & churn prevention, SuprSend for notification infrastructure, Skool for community platforms and Polar for subscription billing, each the leading tool in that category on published criteria. ### What do I pair with Walnut for Product Analytics & Session Replay? Kissmetrics. Walnut lists it does nothing for signed-up users inside your product among its limits. Kissmetrics adds a free tier with real. Feature usage and drop-off are measurable, so a roadmap argument can end with evidence. ### How many tools do I need alongside Walnut? Walnut sits next to 6 other categories in a working onboarding 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 Polar worth adding alongside Walnut? Walnut is built for onboarding, not billing. Polar adds best-in-category developer experience. Recurring revenue bills, retries and reconciles itself, including the tax nobody wants to calculate. --- 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.