The Best Supply Side Platforms in 2026

• 19 tools ranked
• Updated Sep 2026
• Researched from official sources
• Compare tools in this directory

We researched Supply Side Platforms using official vendor websites, including pricing pages, plan tables, and product documentation. Rankings focus on the category’s core job, value for money, and verified features that matter when evaluating publisher monetization. Compare options for selling web, app, video, and connected-TV inventory through programmatic channels.

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.

The full ranking 19 tools, best first

1. 1
   
   Magnite 9.0

   Best forLarge publishers monetizing across channels

   A multi-channel SSP with header bidding, deal workflows and yield tools.

   • Header bidding support
   • Private marketplace deals

   Pricing on request Our Magnite verdict → + Compare Visit MagniteFor vendors Sponsor this spot · #1 · $149/mo →
   9.0/10★★★★☆

   Visit Magnite
2. 2
   P
   PubMatic 8.2

   Best forPublishers optimizing cross-screen ad yield

   A cross-screen SSP combining header bidding, deal management and yield optimization.

   • Header bidding support
   • Private marketplace deals

   Pricing on request Our PubMatic verdict → + Compare Visit PubMaticFor vendors Sponsor this spot · #2 · $99/mo →
   8.2/10★★★★☆

   Visit PubMatic
3. 3
   
   Index Exchange 7.7

   Best forPublishers prioritizing exchange and deal reporting

   An established exchange with direct integrations, multiple deal types and detailed reporting.

   • Header bidding support
   • Private marketplace deals

   Pricing on request Our Index Exchange verdict → + Compare Visit Index ExchangeFor vendors Sponsor this spot · #3 · $79/mo →
   7.7/10★★★★☆

   Visit Index Exchange
4. 4
   
   OpenX 7.4

   Best forPublishers needing broad inventory and deal controls

   OpenX gives publishers broad inventory, deal, targeting, auction, and reporting controls.

   • Header bidding support
   • Private marketplace deals

   Pricing on request Our OpenX verdict → + Compare Visit OpenXFor vendors Sponsor this spot · #4 · $69/mo →
   7.4/10★★★★☆

   Visit OpenX
5. 5
   
   Media.net 7.1

   Best forPublishers seeking managed Prebid and contextual demand

   A broad monetization toolkit centered on managed Prebid and contextual demand.

   • Header bidding support
   • Private marketplace deals

   Pricing on request Our Media.net verdict → + Compare Contact Media.netFor vendors Sponsor this spot · #5 · $59/mo →
   7.1/10★★★★☆

   Contact Media.net
6. 6
   
   Admixer.SSP 6.9

   Best forPublishers monetizing CTV, apps and DOOH

   A multi-format SSP for publishers monetizing web, app, CTV and DOOH inventory.

   • Header bidding support
   • Private marketplace deals

   Pricing on request Our Admixer.SSP verdict → + Compare Visit Admixer
   6.9/10★★★☆☆

   Visit Admixer
7. 7
   
   Azerion SSP 6.8

   Best forPublishers seeking many demand integrations and formats

   An omnichannel SSP with more than 60 DSP integrations, deal support and real-time reporting.

   • Private marketplace deals

   Pricing on request Our Azerion SSP verdict → + Compare Visit Azerion SSP
   6.8/10★★★☆☆

   Visit Azerion SSP
8. 8
   
   Adform SSP 6.6

   Best forMid-market and enterprise publishers using header bidding

   An SSP for publishers combining header bidding, auction controls and transaction-level reporting.

   • Header bidding support
   • Private marketplace deals

   Pricing on request Our Adform SSP verdict → + Compare Visit Adform
   6.6/10★★★☆☆

   Visit Adform
9. 9
   
   Sovrn Ad Exchange 6.5

   Best forPublishers needing flexible auction paths and reporting

   A multi-path exchange for web, mobile-app and CTV inventory with detailed reporting.

   • Header bidding support
   • Private marketplace deals

   Pricing on request Our Sovrn Ad Exchange verdict → + Compare Contact Sovrn
   6.5/10★★★☆☆

   Contact Sovrn
10. 10
    
    Publica 6.3

    Best forCTV and streaming video publishers

    A video-focused monetization platform for CTV, streaming, and web video publishers.

    • Header bidding support
    • Private marketplace deals

    Pricing on request Our Publica verdict → + Compare Visit Publica
    6.3/10★★★☆☆

    Visit Publica
11. 11
    
    Adtelligent 6.2

    Best forPublishers seeking white-label monetization and buying tools

    A broad SSP and self-serve DSP suite for publishers and teams that need white-label options.

    Pricing on request Our Adtelligent verdict → + Compare Visit Adtelligent
    6.2/10★★★☆☆

    Visit Adtelligent
12. 12
    
    GumGum 6.1

    Best forPublishers focused on contextual and high-impact video ads

    A contextual ad platform connecting publisher inventory to video and high-impact campaigns.

    Pricing on request Our GumGum verdict → + Compare Contact GumGum
    6.1/10★★★☆☆

    Contact GumGum
13. 13
    
    DT FairBid 6.0

    Best forApp publishers seeking free mediation and unified auctions

    A free mediation platform combining SDK bidding, waterfalls, and unified auctions.

    Free plan Our DT FairBid verdict → + Compare Visit DT FairBid
    6.0/10★★★☆☆

    Visit DT FairBid
14. 14
    
    Cadent Inventory Manager 6.0

    Best forEnterprise buyers seeking curated CTV supply paths

    Direct CTV and digital supply paths with curated deals, reporting and quality controls.

    • Private marketplace deals

    Pricing on request Our Cadent Inventory Manager verdict → + Compare Visit Cadent
    6.0/10★★★☆☆

    Visit Cadent
15. 15
    TD
    Triton Digital SSP 5.9

    Best forPublishers focused on programmatic audio monetization

    Audio-focused SSP linking publisher inventory to programmatic demand and yield tools.

    Pricing on request Our Triton Digital SSP verdict → + Compare Visit Triton Digital
    5.9/10★★★☆☆

    Visit Triton Digital
16. 16
    
    Microsoft Retail Media 5.8

    Best forRetailers building onsite and offsite media programs

    A retail-focused platform for onsite, offsite and pilot in-store media programs.

    Pricing on request Our Microsoft Retail Media verdict → + Compare Visit Microsoft
    5.8/10★★★☆☆

    Visit Microsoft
17. 17
    
    Teads 5.7

    Best forAdvertisers planning cross-device video and native campaigns

    An advertiser-side platform for planning, targeting, optimizing, and measuring campaigns.

    Pricing on request Our Teads verdict → + Compare Visit Teads
    5.7/10★★★☆☆

    Visit Teads
18. 18
    
    Nexxen DSP 5.7

    Best forAdvertisers buying cross-platform programmatic media

    A cross-channel DSP combining audience activation, automation, deals and measurement.

    Pricing on request Our Nexxen DSP verdict → + Compare Visit Nexxen
    5.7/10★★★☆☆

    Visit Nexxen
19. 19
    
    Yieldmo 5.6

    Best forDigital publishers and advertisers exploring ad technology

    Yieldmo serves digital publishers and advertisers; its specific capabilities are unclear.

    Pricing on request Our Yieldmo verdict → + Compare Contact Yieldmo
    5.6/10★★★☆☆

    Contact Yieldmo

No tools match those filters.

Compare at a glance

#	Tool	Free plan	Paid from	Inventory channels	Auction types	Header bidding support	Private marketplace deals	Ad formats	Score
1	Magnite	No	—	CTV/OTT, display, online video, audio, native, digital out-of-home, mobile in-app	open auction, private marketplace, programmatic guaranteed	Yes	Yes	display, online video, audio, native, digital out-of-home, mobile in-app, CTV/OTT	9.0
2	PPubMatic	No	—	CTV/OTT, online video, mobile app, mobile web, desktop web	real-time bidding (RTB), header bidding, unified auctions, private marketplace and programmatic guaranteed	Yes	Yes	display/banner, static display, video, outstream video, interstitial, rewarded video, native, rich media	8.2
3	Index Exchange	—	—	web, mobile apps, streaming TV (STV) apps	first-price, fixed-price; private auctions/deals	Yes	Yes	banner, video (instream, outstream, rewarded where supported), native	7.7
4	OpenX	—	—	Connected TV (CTV), display, video, mobile, digital out-of-home (DOOH), native	First-price, second-price	Yes	Yes	Display, video, mobile, native, connected TV (CTV), digital out-of-home (DOOH)	7.4
5	Media.net	—	—	web, AMP, in-app	real-time auctions	Yes	Yes	display, native, video, text, push, image, rich media, expandable	7.1
6	Admixer.SSP	—	—	desktop, mobile web, in-app, CTV, DOOH	open auctions, private marketplace (PMP), programmatic guaranteed	Yes	Yes	display, native, video, audio, rich media	6.9
7	Azerion SSP	—	—	Web, app, connected TV (CTV), digital out-of-home (DOOH)	—	—	Yes	Display, native, video, audio, rich media	6.8
8	Adform SSP	—	—	video, in-app, desktop, native, mobile, rich media	real-time bidding; first-price; second-price; fixed-CPM deals	Yes	Yes	video, rich media	6.6
9	Sovrn Ad Exchange	—	—	Web; mobile app; connected TV (CTV)	Header bidding; Amazon TAM; Google Open Bidding; server-to-server API; Nimbus; SpringServe; Publica; private marketplace deals	Yes	Yes	Display (banner); video; native (reporting dimension only)	6.5
10	Publica	—	—	CTV/OTT streaming, web video (instream and outstream)	Price-based unified auction; programmatic deals; open auction demand	Yes	Yes	CTV/OTT streaming video; instream video; outstream video; VAST tags	6.3
11	Adtelligent	—	—	—	—	—	—	display, video, native, audio, push, pop, search, CTV/OTT	6.2
12	GumGum	No	—	—	—	—	—	CTV, online video, high-impact display, skins, Hang Time, Velocity, interactive formats, in-content, ad break, pause placements	6.1
13	DT FairBid	Yes	None	—	—	—	—	—	6.0
14	Cadent Inventory Manager	No	—	CTV, digital	—	—	Yes	CTV, digital	6.0
15	TDTriton Digital SSP	—	—	—	—	—	—	—	5.9
16	Microsoft Retail Media	—	—	—	—	—	—	—	5.8
17	Teads	—	—	—	—	—	—	—	5.7
18	Nexxen DSP	—	—	—	—	—	—	—	5.7
19	Yieldmo	—	—	—	—	—	—	—	5.6

Head-to-head All 28 comparisons →

• PMagnite vs PubMatic
• Magnite vs Index Exchange
• Magnite vs OpenX
• Magnite vs Media.net
• Magnite vs Admixer.SSP
• Magnite vs Azerion SSP
• Magnite vs Adform SSP
• PPubMatic vs Index Exchange
• PPubMatic vs OpenX

How we rank supply side platforms

Every tool on this page was researched by iTechGuides Editors from its official website — pricing pages, plan tables and product documentation. We rank on how well each one does this category's core job, what the free or entry plan includes, and where it falls short. Where we have enough verified facts, the score out of 10 is a rubric — job fit, value and how much we could verify — shown with its breakdown on every tool's page; a tool we have not verified enough to score yet shows its rank without a number. Scores are re-checked when a product changes its plans. Read the full editorial policy, or submit a tool we missed.

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated 28 Sep 2026 · How we research and update