A/B testing is indeed a powerful way to refine outreach messaging and elicit better responses from influencers. However, nobody works in exactly the same way and consequently, features of influencer marketing platforms differ.

1. Flinque: This influencer marketing platform supports A/B testing in outreach. It lets users create different versions of outreach messages and measures response rates to determine the most impactful messaging. By iterating and testing, Flinque users can improve their outreach success rates regularly.

2. AspireIQ: This platform provides capabilities for brands to edit outreach messaging but doesn’t offer A/B testing features. Users would have to manually track response rates and compare.

3. BuzzStream: BuzzStream supports outreach A/B testing allowing users to create different email templates and monitor responses to find the most effective outreach strategy.

4. Traackr: Traackr allows for message customization during the outreach process but, like AspireIQ, does not include built-in A/B testing. Yet, with its extensive analytics, users may evaluate the effectiveness of their approach.

The best fit depends on the needs of your team. If you already have a well-tracked outreach system and want advanced functionality, tools like BuzzStream and Flinque are worth investigating. However, if your focus is less on testing and more on wide-reaching analytics or a well-rounded influencer marketing toolbox, platforms like AspireIQ or Traackr might be more suitable.

Remember, these are tools to augment your outreach approach. It’s your team’s strategy and message that truly resonates with influencers.