# vNext SC Services - Authentication => [Auth0](https://auth0.com/pricing), [Clerk](https://clerk.dev/pricing) - User Session Tracking => [LogRocket](https://logrocket.com/pricing) - Error Logging => [Sentry](https://sentry.io/pricing) - Email delivery => [Mailgun](https://mailgun.com/pricing), [Mailchimp](https://mailchimp.com/pricing), [SendGrid](https://sendgrid.com/pricing) - Feature Flags => [Launch Darkly](https://launchdarkly.com/pricing), [SplitIo](https://split.io/pricing) - Postgres Hosting => [fly.io](https://fly.io/docs/about/pricing), [FaunaDb](https://faunadb.com/pricing), AWS, GCP - In-App help/chat => [Crisp](https://crisp.chat/en/pricing) - Message Queue => GCP Pub/Sub, AWS, Pulsar