There are several B2B marketing platforms that integrate with Salesforce to help businesses optimize their marketing efforts and improve customer engagement. Keep in mind that the best platform for your organization will depend on your specific needs, goals, and budget. Here are a few popular B2B marketing platforms that integrate well with Salesforce:

1. Pardot (by Salesforce): Pardot is a B2B marketing automation platform specifically designed for Salesforce users. It offers features such as lead nurturing, email marketing, lead scoring, landing page creation, and ROI reporting. Pardot’s tight integration with Salesforce allows for seamless data sharing between marketing and sales teams.

2. HubSpot: HubSpot offers an inbound marketing and sales platform that includes tools for email marketing, lead generation, content creation, social media management, and more. It integrates well with Salesforce, enabling businesses to manage leads and customer interactions effectively.

3. Marketo (by Adobe): Marketo is a marketing automation platform that provides B2B marketers with tools for lead management, email marketing, marketing analytics, and campaign management. Marketo’s integration with Salesforce helps align marketing and sales efforts.

4. Eloqua (by Oracle): Oracle Eloqua is a marketing automation platform that offers features like lead scoring, email marketing, campaign management, and analytics. It integrates with Salesforce to ensure consistent communication between marketing and sales teams.

5. Act-On: Act-On is a marketing automation platform that includes features for email marketing, lead nurturing, social media management, and reporting. Its integration with Salesforce enables data synchronization and a cohesive lead management process.

6. SharpSpring: SharpSpring is a marketing automation platform that provides tools for lead tracking, email marketing, landing page creation, and CRM integration. While it’s not as widely known as some others, it offers robust capabilities for B2B marketing.

7. Salesfusion (by SugarCRM): Salesfusion is a marketing automation platform that offers features like lead nurturing, email marketing, and campaign tracking. It integrates with Salesforce to ensure data consistency and smooth lead management.

When selecting a B2B marketing platform to integrate with Salesforce, consider factors such as the specific features you need, ease of use, scalability, pricing, customer support, and the overall fit with your organization’s marketing strategy.

Please note that the landscape of marketing platforms can change rapidly, and new platforms may have emerged since my last update. I recommend researching the most current information and reviews for these platforms before making a decision.