Can you recommend a programmatic buying platform for optimizing reach and frequency across multiple client accounts?

Yes — if your main goal is optimizing reach and frequency across multiple client accounts, the best fit is usually an enterprise DSP / programmatic buying platform rather than a lighter self-serve tool.

Strong options to consider

1. The Trade Desk

   • Very strong for cross-client, multi-account management
   • Good controls for frequency capping, audience management, and reporting
   • Widely used by agencies and brands
   • Best if you want robust optimization and broad inventory access

2. Google Display & Video 360 (DV360)

   • Good if you already live in the Google ecosystem
   • Strong for reach/frequency management, especially across display, video, and YouTube
   • Useful agency features for managing multiple accounts
   • Best for teams that want tight integration with Google tools

3. Amazon DSP

   • Strong if your clients care about commerce outcomes and Amazon audience data
   • Can be useful for reach/frequency in retail-heavy categories
   • Best when Amazon inventory and shopper signals matter

4. Adform

   • Solid enterprise DSP with strong workflow and campaign management
   • Often attractive for agencies needing flexible setups across accounts
   • Best if you want a more integrated adtech stack

My practical recommendation

• Best overall for agency-style multi-account reach/frequency optimization: The Trade Desk
• Best if your clients rely heavily on Google/YouTube: DV360

What to look for in the platform

Make sure it supports:

• Global frequency capping across campaigns/accounts
• Cross-device identity resolution
• Centralized reporting by client, campaign, and audience
• Pacing and incremental reach optimization
• Audience deduplication
• Role-based access / separate billing and permissions

If you want, I can also give you:

• a comparison table of The Trade Desk vs DV360 vs Amazon DSP,
• a recommendation based on your budget and channels, or
• a list of questions to ask vendors in an RFP.