Technology
Basis Platform
Advertising Operating System
Communication Portal
Intelligent Collaboration
All Channel Activation
Activate Media on Every Channel
Consulting
Resources
For most agencies, the DSP is where media plans turn into live campaigns, which makes it one of the more consequential platform decisions a team can make. Choose well, and planning, buying, and reporting move faster across every account. Choose poorly, and the platform adds friction to campaigns it was supposed to accelerate.
The best DSP for agencies depends on your agency's size, client volume, and channel mix. Platforms like Basis, The Trade Desk, DV360, Amazon DSP, Viant, and Simpli.fi each serve different agency profiles, from independent boutiques managing a handful of accounts to mid-market teams running programmatic, search, social, and direct buys across dozens of verticals. The right demand side platform reduces operational complexity, improves reporting transparency, and scales with your client roster rather than against it.
That decision carries more weight every year. Programmatic now accounts for roughly 91% of US digital display ad spend, so the platform an agency uses to access it shapes a growing share of the work. At the same time, tool sprawl is climbing: Basis' 2026 Advertising Agency Report found that more than one-third of full-service and media agencies now manage 10 or more adtech tools, more than double the share two years ago, with inefficient processes (44.1%) and siloed systems (40.4%) ranking as their top operational challenges. The DSP you choose either adds to that burden or helps remove it.
This guide compares leading demand side platforms by agency type, walks through the evaluation criteria that matter most, and helps you build a case for the right investment.
The right DSP for your agency is the one that matches your team's workflow, your clients' channel requirements, and your growth trajectory. There is no universal "best" platform. A platform that excels for a holding-company network may create friction for an independent shop, and vice versa.
Start by identifying where you fall across three dimensions:
Once you map your agency against these dimensions, the field narrows quickly. A boutique with five clients and a display-heavy media mix has different requirements than a mid-market shop running full-funnel campaigns across 30 accounts. For a deeper look at the criteria that should guide your evaluation, this guide to choosing the right omnichannel DSP covers the decision in more detail.
Agencies should evaluate DSPs across six core dimensions: inventory breadth, multi-client account management, campaign optimization, reporting transparency, onboarding support, and pricing model clarity.
Inventory breadth determines where your ads can run. The strongest programmatic platforms for agencies offer access to premium display, video, native, audio, CTV, and digital out-of-home inventory through direct publisher integrations, private marketplaces, and the open exchange. This matters more as budgets shift to streaming: US CTV ad spend is on pace to reach about $38 billion in 2026, up nearly 15% year over year, so inventory access increasingly means streaming reach. Brand safety and ad fraud protection are also part of this evaluation. (For a detailed look at how leading DSPs handle both, see this comparison of DSPs for ad fraud protection and brand safety.)
Multi-client account management is where many DSPs fall short for agencies. You need hierarchical account structures that let you manage budgets, audiences, and creative assets at the client level without cross-contamination. Platforms designed for single-advertiser use often require workarounds that slow your team down.
Campaign optimization should go beyond basic bid adjustments. Look for algorithmic optimization across KPIs, automated budget pacing, and the ability to shift spend across tactics in real time. With AI now used at more than 99% of agencies, the question is no longer whether a platform applies AI but how much routine optimization it removes from your team's plate.
Reporting transparency matters for both internal decisions and client communication. Your DSP should provide granular, exportable reporting with clear visibility into costs, margins, and performance by tactic, channel, and audience segment. If you need to rebuild reports outside the platform, that is a red flag.
Onboarding support is especially critical for agencies switching platforms or adopting programmatic for the first time. Structured onboarding, dedicated success managers, and ongoing training reduce time-to-value and protect campaign performance during the transition.
Pricing model clarity separates platforms you can trust from those that obscure costs. Understand whether a DSP charges on a CPM basis, a percentage of spend, a flat SaaS fee, or some combination. Hidden fees can erode your margins and make it harder to forecast profitability for your clients.
If you want a refresher on how these platforms work, this DSP fundamentals guide covers the essentials.
The leading demand side platforms popular with agencies in 2026 each have distinct strengths. The right fit depends on your agency's profile, so the comparison below is organized by use case rather than a single ranking.
| Platform | Core strength | Best for |
| Basis | Unified planning, buying, optimization, reporting, and billing across programmatic, search, social, and direct | Agencies that want to consolidate their full workflow in one platform, plus expansive programmatic inventory, supply path transparency, and award-winning service |
| The Trade Desk | Enterprise-grade programmatic scale | Large, tech-savvy programmatic teams with substantial budgets |
| DV360 | Deep Google ecosystem integration and YouTube access | Google-centric campaigns that lean on GA4 and CM360 |
| Amazon DSP | Purchase-intent targeting built on Amazon shopping data | Commerce and retail clients with high spend |
| Viant | CTV reach and people-based, cookieless identity | Programmatic teams prioritizing streaming and AI-driven execution |
| Simpli.fi | Localized and multi-location programmatic at scale | Agencies with franchise, local, or multi-location clients |
| Platform | Programmatic | Paid search | Paid social | Direct buys | Billing & reconciliation | CTV | Entry point |
| Basis | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | Lower threshold |
| The Trade Desk | ✓ | ✗ | ✗ | ✗ | ✗ | ✓ | ~$10K+/mo |
| DV360 | ✓ | Limited¹ | ✗ | ✗ | ✗ | ✓ | GMP contract (~$50K+/mo) |
| Amazon DSP | ✓ | ✗² | ✗ | ✗ | ✗ | ✓ | $10K rec. self-serve / $50K managed |
| Viant | ✓ | ✗ | ✗ | ✗ | ✗ | ✓ | Self-serve & managed |
| Simpli.fi | ✓ | ✗ | Partial³ | ✗ | Separate⁴ | ✓ | Self-serve & managed |
¹ DV360's search functionality is limited; agencies typically run paid search through Google Ads separately. ² Amazon's search ads run through its own sponsored-ads console, separate from Amazon DSP. ³ Simpli.fi reaches social inventory programmatically but is not a paid-social campaign-management tool. ⁴ Simpli.fi offers agency workflow and billing through its separate Advantage and Core Media product line, not a natively unified platform.
The best DSPs for agencies in 2026 include Basis, The Trade Desk, DV360, Amazon DSP, Viant, and Simpli.fi, and the right choice depends less on raw programmatic horsepower than on how much of the agency workflow a platform can absorb. A team running programmatic across a handful of large accounts, for instance, has different needs than a shop reconciling dozens of clients across channels. With that in mind, the sections below will evaluate each platform on channel coverage, workflow depth, and the agency profile it fits best.
Basis is an AI-powered advertising platform built specifically for how agencies operate. It consolidates campaign planning, programmatic buying, paid social, search, direct deals, reporting, and billing into a single platform, eliminating the tool fragmentation that drives up operational cost and manual effort across agency teams.
Here is how a typical agency campaign flows through Basis:
Basis' partnership with Mediaocean extends its financial workflow capabilities, connecting media planning data with downstream billing and reconciliation systems. For agencies that use Mediaocean for billing and finance, Basis functions as the execution engine that sits in front of it. The platform's AI optimization has produced measurable gains, with some agencies reporting up to a 5x improvement in advertising performance. For agencies managing high client volume across verticals, that combination of consolidation and performance is what separates Basis from point solutions that address only one stage of the campaign lifecycle.
Basis is strongest for: Full-service and media agencies that need one platform to handle every stage of the campaign lifecycle—from planning to activating to optimizing to reporting to billing—across both the open web and walled gardens.
The Trade Desk has built a strong reputation for enterprise-grade programmatic buying. Its bidding capabilities, access to a large third-party data marketplace, and strong connected TV inventory make it a credible choice for sophisticated, large-scale programmatic programs.
That sophistication, however, comes with a steep learning curve, and its formidable monthly minimums make it best suited to agencies with dedicated programmatic expertise and clients with substantial budgets. The Trade Desk is also programmatic-only. It does not handle paid search, paid social, or direct buys, so agencies still need separate tools for non-programmatic channels and a separate system for billing and reconciliation.
The Trade Desk is strongest for: Large agencies running high-volume programmatic programs with dedicated ad tech resources and clients whose media mix is weighted toward programmatic.
DV360 (Google Display & Video 360), part of the broader Google Marketing Platform, offers programmatic buying with detailed attribution and tight integration across Google's ecosystem, including exclusive YouTube inventory, the Google Display Network, Campaign Manager 360, and Google Analytics 4. For advertisers running Google-heavy campaigns, that interoperability is hard to match.
The tradeoffs, however, are significant. DV360 is not available as a self-serve product: Access requires a Google Marketing Platform contract with practical minimum spend thresholds, and its utility diminishes outside Google-owned environments. Search functionality is limited, and the platform does not handle paid social, direct buys, billing, or financial reconciliation. For agencies whose clients need omnichannel reach beyond Google, DV360 addresses only part of the buying workflow.
DV360 is strongest for: Agencies running Google-heavy, attribution-focused campaigns, particularly teams with in-house analytics expertise already operating within the Google stack.
Amazon DSP gives agencies access to something few platforms can replicate: targeting built on Amazon's proprietary shopping, browsing, and streaming data. Purchase-intent signals derived from Amazon's retail ecosystem offer uniquely powerful audience targeting based on actual purchase behavior rather than inferred intent, alongside premium inventory across Prime Video, Twitch, Thursday Night Football, and Fire TV.
The tradeoff is cost and scope. Self-service access carries no hard minimum, though Amazon recommends roughly a $10,000 campaign budget for some formats to generate enough data for optimization, while managed service requires a minimum commitment of around $50,000 per month. The platform's core advantage is strongest for retail, CPG, and e-commerce clients; agencies serving other verticals will find it less relevant. Amazon DSP also operates as a walled garden and does not handle paid search, paid social, direct buys, media planning workflows, billing, or reconciliation.
Amazon DSP is strongest for: Agencies with commerce-focused clients that can put Amazon's shopper data and premium streaming inventory to work.
Viant is an AI-powered, CTV-focused programmatic DSP whose central differentiator is its Household ID, a deterministic, people-based identity solution built for cookieless, cross-device targeting and measurement. The platform pairs solid connected TV and video inventory with autonomous campaign features, including a product that handles setup, optimization, and management with limited manual intervention.
For agencies, the constraints mirror other programmatic-only platforms. Viant does not offer search, social, or direct buying, and it carries no agency workflow, billing, or financial operations layer. Its interface and advanced features can present a learning curve, and the autonomous approach, while innovative, reduces hands-on trader control, which some teams prefer to keep.
Viant is strongest for: Programmatic teams that prioritize CTV reach and people-based identity and are comfortable leaning on automated execution.
Simpli.fi is a programmatic platform with a clear specialty in localized and hyperlocal advertising, including geo-fencing, geo-conversion tracking, and multi-location campaign management at scale across CTV, display, video, native, and audio.
However, users flag a complex interface and a learning curve for new teams. Additionally, Simpli.fi's strength is concentrated in local and multi-location use cases, so agencies with national or non-local clients may find its core value proposition less applicable.
Simpli.fi is strongest for: Smaller agencies serving local, multi-location clients that need hyperlocal targeting at scale.
The strongest platforms automate routine optimization and surface reporting that scales across clients, so teams spend their time on strategy rather than manual adjustments.
Campaign optimization in modern DSPs goes well beyond setting a bid and walking away. Leading platforms use machine learning to adjust bids in real time, shift budget across tactics and channels as results come in, and pace spend to avoid over- or under-delivery, all aimed at the outcomes clients care about. Reporting is where that quality becomes visible to clients: The best platforms offer dashboards configurable per client, scheduled report delivery, transparent cost breakdowns that separate media from platform fees, and cross-channel views that show how programmatic, search, social, and direct buys perform together.
The deeper divide is structural. Most of the platforms above handle one slice of the workflow well. A programmatic DSP executes programmatic buys, but with most demand side platforms, agencies still need to run separate tools for search, social, direct deals, and the back-office work of billing and reconciliation. Each added tool is another login, another data silo, and another manual handoff, which is why tool sprawl tracks so closely with the inefficiency and siloed-system challenges agencies report. The platforms that stand apart are the ones that reduce the number of systems an agency has to operate, not add to it. That unified model is where Basis, in particular, is built to compete—and it is increasingly what cross-channel, AI-driven optimization depends on, since connected data is the input those systems need to work.
Independent DSPs operate without ties to a specific holding company or media conglomerate, giving agencies more flexibility in how they buy media and where they allocate spend. Holding-company-affiliated platforms may offer preferential pricing or bundled services, but they can also limit access to competitive inventory or lock teams into a single ecosystem.
For independent and boutique agencies, this distinction matters. If your agency is not part of a major network, you need a DSP that offers transparent pricing, open marketplace access, and support that does not assume you have a 50-person ad ops team. The best independent DSPs provide the same caliber of technology, inventory access, and optimization available to large networks, without enterprise-level minimums.
Third-party agencies evaluating DSPs should pay close attention to contract terms. Some platforms require long-term commitments or minimum monthly spend that can be prohibitive for smaller shops; others offer flexible models that scale with the business. The broader question is how the DSP fits the full tech stack alongside your ad server, data tools, and campaign management. For a wider view, see how top advertising agency platforms for media buying compare.
Building a business case for a new DSP requires framing the investment in terms leadership cares about: operational efficiency, margin improvement, and client retention.
Basis unifies programmatic, direct, search, social, and connected TV buying in a single platform, giving agencies one place to plan, execute, optimize, and report across every digital channel.
For agencies managing high client volume, Basis provides the multi-client account structures, automated reporting, and cross-channel visibility that reduce operational complexity. For independent agencies competing with larger networks, it offers enterprise-grade technology paired with dedicated onboarding, training through AdTech Academy, and ongoing support from a dedicated Success Manager.
Explore Basis DSP to see how it fits your agency's needs.
What is the best DSP for agencies? The best DSP for agencies depends on client volume, channel mix, and team experience. Agencies that want planning, programmatic, search, social, direct buys, and billing in one place tend to favor a unified platform like Basis, while teams focused purely on programmatic scale may prefer The Trade Desk or DV360. Map your requirements first, then match them to the platform that removes the most friction across your full operation.
What is a DSP and how do agencies use it for programmatic advertising? A DSP, or demand side platform, is software that lets advertisers and agencies buy digital ad inventory programmatically through automated, real-time auctions. Agencies use DSPs to plan, execute, and optimize campaigns across display, video, native, CTV, and audio from a single interface. The DSP automates bidding, applies audience targeting, and reports on performance, letting agencies manage media buying at scale across multiple clients.
Which leading demand side platforms are popular with agencies in 2026? Leading demand side platforms used by agencies in 2026 include Basis, The Trade Desk, DV360, Amazon DSP, Viant, and Simpli.fi. Each serves a different profile: Basis unifies programmatic, search, social, CTV and direct buys with planning, billing; The Trade Desk and Viant focus on programmatic scale and CTV; DV360 integrates with the Google ecosystem; Amazon DSP brings shopper-data targeting; and Simpli.fi specializes in localized, multi-location campaigns.
What is the best DSP for independent agencies? The best DSP for an independent agency offers transparent pricing, open marketplace access, flexible contract terms, and strong onboarding support without enterprise-level minimums. Independent shops should prioritize platforms that deliver the same technology and inventory access as large networks while providing hands-on support, since they rarely have large in-house ad ops teams.
Which DSP is best for agencies managing high client volume across verticals? Agencies managing high client volume across verticals need hierarchical multi-client account structures, per-client reporting, and broad channel coverage in one system. A unified platform that handles programmatic, search, social, and direct buys, along with billing and reconciliation, reduces the manual handoffs and data silos that multiply as account counts grow.
What DSPs offer the best customer support and onboarding? Agencies adopting or switching platforms should prioritize structured onboarding, dedicated success managers, and ongoing training, all of which reduce time-to-value and protect performance during a transition. Basis pairs its platform with a services organization that provides consulting, onboarding, and training through AdTech Academy, along with a dedicated Success Manager for ongoing support.
What is the difference between a managed-service DSP and a self-serve DSP for agencies? A self-serve DSP gives your team direct control over setup, optimization, and reporting, which suits agencies with experienced programmatic traders. A managed-service DSP provides hands-on support from the platform's team, handling some or all execution on your behalf. Many platforms offer both, letting agencies choose the level of support that matches their team's capabilities and workload.
Can small or independent agencies access the same DSP technology as large agency networks? Yes. Many leading DSPs offer independent agencies the same technology, inventory access, and optimization they provide to large networks. The key is to evaluate pricing minimums, contract flexibility, and onboarding support, since some platforms require enterprise-level spend commitments while others offer flexible models built for independent teams.
Where can I compare trusted DSP platforms for digital campaigns? You can compare DSPs using the at-a-glance and channel-coverage tables in this guide, which evaluate Basis, The Trade Desk, DV360, Amazon DSP, Viant, and Simpli.fi across channel support, billing, CTV access, and entry point. Score each platform against your own client volume, channel mix, and team experience to identify the strongest fit.
How much does it cost to run a DSP campaign through an agency? DSP campaign costs vary by pricing model, media spend, and the channels you activate. Common structures include a percentage of media spend, CPM-based fees, or a flat SaaS subscription, and some platforms combine them. Beyond platform cost, factor in creative production, data fees for audience targeting, and any managed-service charges. Request a transparent fee breakdown from each DSP you evaluate so you can forecast client margins accurately.