Problem: Boutique LinkedIn outreach agencies run campaigns across many client accounts at once. When they tweak a message sequence, they are effectively gambling with each client's LinkedIn account, which can be restricted or banned for aggressive or poorly performing outreach. There is no safe way to validate a sequence before it goes live at scale, so agencies learn by burning real accounts and real client reputations. Named product: LinkedOut Sequence Tester. Solution: A sandbox environment where agencies A/B test message sequences before deploying them to live client accounts. Agencies draft variants, simulate reply and acceptance behavior, and compare performance signals so they only push the winning sequence into production. MVP: A sequence editor that supports A/B variants, a dashboard comparing variant performance, and an export or deploy path into the agency's existing automation tool such as Expandi or Apollo. The initial wedge is testing and comparison, not sending, which keeps the product off the risky side of LinkedIn's terms. Revenue: Flat monthly SaaS subscription per agency seat with tiering by number of client accounts managed. GTM: Target the boutique agencies already consuming the heavy LinkedIn outreach and Apollo sequence tutorial content on YouTube. Growth loops: Agencies share winning sequence templates and benchmarks, which pulls in peers, and client-facing performance reports carry the product brand into prospect conversations.