Programmatic advertising is the automated buying of ad space across thousands of websites, apps, streaming services and connected TVs, usually through a demand-side platform (DSP). Instead of negotiating with publishers one by one, you set your audience, budget and goals, and the platform bids for each impression in real time.
It is powerful. It is also easy to waste money on. This guide covers the leading platforms, what each is best at, and whether programmatic makes sense for your business yet. It sits alongside the rest of your digital marketing services mix, not instead of it.
How programmatic advertising works (in one minute)
- DSP (demand-side platform): the tool advertisers use to buy impressions and manage targeting and bids.
- SSP (supply-side platform): the tool publishers use to sell their ad space.
- Ad exchange: the marketplace where DSPs and SSPs meet, often in an auction that runs in milliseconds.
- Data: your first-party audiences (customer lists, site visitors) plus contextual and third-party signals decide who sees your ads.
The leading programmatic platforms
1. Google Display & Video 360 (DV360)
Best for: brands already invested in the Google ecosystem who want display, video and YouTube in one place.
DV360 offers wide reach across Google's inventory and partner exchanges, strong YouTube buying, and tight integration with Google Analytics and Campaign Manager for measurement. It is typically accessed through an agency or Google partner rather than self-serve.
2. The Trade Desk
Best for: independent, omnichannel buying across display, video, audio and connected TV.
The Trade Desk is the largest independent DSP. Its appeal is neutrality (it doesn't own the inventory it sells), deep CTV and streaming reach, and strong planning and reporting tools. It suits brands that want flexibility beyond any single walled garden.
3. Amazon DSP
Best for: ecommerce and consumer brands, especially those selling on Amazon.
Amazon DSP lets you use Amazon's shopping signals to reach audiences on and off Amazon, including streaming inventory. For brands selling on the marketplace, the ability to connect ad exposure to purchase behaviour is its main advantage. If you sell online, your ecommerce website design and product feeds matter as much as the ad platform.
4. StackAdapt
Best for: mid-sized advertisers and B2B marketers who want a self-serve platform that is easier to run.
StackAdapt is known for its usability, native ads and B2B targeting options. It is often the first DSP for teams graduating from Google and Meta ads who want to manage programmatic themselves.
5. Criteo
Best for: retail and ecommerce retargeting and commerce media.
Criteo built its name on dynamic product retargeting and has expanded into retail media, placing ads on retailer sites using their shopper data. It works best for businesses with large product catalogues.
Quick comparison
| Platform | Strength | Typical buyer |
|---|---|---|
| DV360 | Google + YouTube reach | Brands, via agency |
| The Trade Desk | Independent, CTV, omnichannel | Larger brands, via agency |
| Amazon DSP | Shopping data | Ecommerce and Amazon sellers |
| StackAdapt | Self-serve, native, B2B | Mid-sized teams |
| Criteo | Product retargeting, retail media | Retail and ecommerce |
Should your business use programmatic yet?
Honestly, many small and mid-sized businesses shouldn't start here. Programmatic works best when: Clear target audience analysis is the first prerequisite.
- You already get consistent results from search and social ads and want more reach.
- You have enough budget to let the platform learn. Small budgets spread across many sites rarely show clear results.
- You have first-party data (customer lists, strong site traffic) to build audiences from.
- You can measure outcomes beyond clicks, such as conversions, store visits or brand lift.
If those aren't true yet, you'll usually get a better return from search, social and a website that converts, then add programmatic for scale. Free Google Shopping listings and video marketing on social are usually better first steps for smaller brands.
How to avoid wasting programmatic budget
- Control where ads appear: use inclusion lists and brand-safety settings rather than buying the open web blindly.
- Watch for fraud and made-for-advertising sites: low-quality sites built purely to sell ads can absorb budget with no business value.
- Cap frequency: showing the same person the same ad twenty times wastes money and annoys them.
- Measure incrementality: retargeting can claim credit for sales that would have happened anyway. Test with holdout groups where possible.
FAQs
Is programmatic the same as display advertising?
Not exactly. Display is a format (banners and visuals). Programmatic is a buying method that can deliver display, video, audio and CTV ads.
Can I run programmatic campaigns myself?
Some platforms, such as StackAdapt, are self-serve. Others, such as DV360 and The Trade Desk, are usually accessed through an agency or managed service.
What budget do I need?
It varies by platform and market, but programmatic generally needs more budget than search or social to gather enough data to optimise. Start with search and social if your budget is limited.
Not sure which channels deserve your budget? We help growing businesses build a channel plan that starts with what will pay back fastest. See our digital marketing services or get in touch.