Are you comparing AutoSPF by DuoCircle, PowerSPF by PowerDMARC, and DynamicSPF by DmarcDuty to find the best SPF flattening tool for digital agencies? You’ve come to the right place.
In this comprehensive breakdown, we’ll explore each tool’s features, automation capabilities, pricing, integrations, and agency-readiness. By the end, you’ll know exactly which solution delivers the most value for managing multiple client domains, avoiding SPF failures, and scaling your agency’s email authentication stack.
Why Unlimited SPF Flattening Matters for Agencies
SPF (Sender Policy Framework) is a fundamental DNS-based mechanism that validates whether an email sender is authorized to use a domain. When properly configured, SPF helps reduce spoofing and improves deliverability. But agencies managing multiple domains face a unique set of challenges:
- The SPF 10-DNS Lookup Limit: Once exceeded, SPF validation fails, leading to rejected emails or “softfail” results.
- Complex Client Infrastructures: Many clients use multiple third-party senders (Microsoft 365, Google Workspace, Salesforce, CRMs, marketing tools), which can easily push SPF beyond the limit.
- Manual Maintenance Risks: Updating SPF records manually across dozens—or even hundreds—of client domains is error-prone and time-consuming.
This is where SPF flattening services come in. Instead of leaving domains vulnerable to lookup failures, these tools dynamically “flatten” records so they always stay under the 10-lookup limit.
For agencies, the right SPF flattening service needs to be automated, scalable, and cost-effective across a large domain portfolio. Let’s see how AutoSPF, PowerSPF, and DynamicSPF compare.
AutoSPF vs PowerSPF vs DynamicSPF: Key Features Breakdown
AutoSPF (by DuoCircle) – Best for Agencies
AutoSPF is designed from the ground up for digital agencies. Unlike other tools that limit domains or require manual upkeep, AutoSPF provides true unlimited SPF flattening across unlimited client accounts.
🔑 Highlights:
- Unlimited SPF records across unlimited domains
- Real-time SPF flattening with automatic updates
- Bulk management dashboard built for agencies
- REST API for automation and integrations
- One-click onboarding with zero DNS complexity
AutoSPF is the only solution here tailored specifically for agencies, combining scale, automation, and simplicity.
PowerSPF (by PowerDMARC) – Enterprise-Oriented
PowerSPF focuses on helping enterprises keep SPF within the 10-lookup limit. It’s reliable but more suited to single-company IT/security teams than agencies.
🔑 Highlights:
- Keeps SPF records compliant under the 10-lookup cap
- Hosted SPF record service
- Best used in combination with PowerDMARC’s suite
- Less flexible for agencies managing multiple clients
DynamicSPF (by DmarcDuty) – Basic Flattening
DynamicSPF provides DNS-based SPF flattening. While effective at solving lookup limit errors, it lacks automation for large portfolios, making it less ideal for agencies.
🔑 Highlights:
- Hosted DNS SPF flattening
- Simple to use for small setups
- Limited scalability for large domain volumes
Feature-by-Feature Comparison
| Feature | AutoSPF | PowerSPF | DynamicSPF |
| Unlimited Domains | ✅ Yes | ❌ Limited | ❌ Limited |
| Real-Time Flattening | ✅ Instant | ⚠️ Refresh Needed | ⚠️ Basic Updates |
| API Access | ✅ Full API | ⚠️ Limited | ❌ None |
| Bulk Management Dashboard | ✅ Yes | ❌ No | ❌ No |
| Ease of Setup | ✅ One-Click | ⚠️ Requires DNS Expertise | ❌ Technical |
| Agency Focus | ✅ Built for Agencies | ❌ Enterprise | ❌ Small Users |
Pricing Comparison
AutoSPF: Simple, Unlimited, Agency-Friendly
AutoSPF offers one subscription that covers unlimited client domains. Agencies don’t have to worry about per-domain pricing or upgrade traps.
- Flat pricing per agency
- Unlimited SPF flattening
- Unlimited domains, no hidden costs
PowerSPF: Tiered for Enterprises
PowerSPF pricing is based on domain counts and feature tiers, making it more costly for agencies with large portfolios.
DynamicSPF: Entry-Level, Pay-As-You-Grow
DynamicSPF is affordable for small users but becomes inefficient at scale.
User Experience Comparison
AutoSPF: Agency-Centric Automation
- Bulk upload + centralized dashboard
- Real-time monitoring across all domains
- Minimal technical overhead (set it once, forget it)
PowerSPF: Enterprise Feel
- Suited for IT teams with technical resources
- Interface geared toward compliance-heavy enterprises
DynamicSPF: Minimalist, Limited
- Fine for small setups
- Agencies often outgrow it quickly
Integrations & Compatibility
- AutoSPF: Works with all DNS providers; integrates with agency tools via REST API.
- PowerSPF: Bundled into PowerDMARC ecosystem; limited standalone integrations.
- DynamicSPF: Works only at DNS level; no external automation options.
Alternatives to AutoSPF, PowerSPF, and DynamicSPF
Other SPF solutions exist, but most are either too technical or not scalable for agencies. Common alternatives include:
- EasySPF – A lightweight SPF flattener, best for single-domain use.
- DNS Made Easy Flattening – Provider-based solution, less flexible for multi-client workflows.
- SPF-Tools (Open Source) – Requires developer resources, not user-friendly.
While interesting for small teams or technical users, none of these provide the scale and automation required by agencies.
Final Verdict: Which SPF Flattening Tool Wins for Agencies?
- Choose AutoSPF if you’re an agency managing dozens or hundreds of client domains. It’s unlimited, fully automated, and built specifically for agency workflows.
- Choose PowerSPF if you’re an enterprise IT/security team already invested in PowerDMARC’s broader suite.
- Choose DynamicSPF if you’re running a small setup and just need a basic DNS-level SPF fix.
👉 For agencies scaling fast, AutoSPF is the clear winner. With unlimited domains, real-time flattening, and automation-first design, it eliminates the headache of manual SPF management and safeguards deliverability across your client base.
FAQs About SPF Flattening for Agencies
1. What is SPF flattening and why do agencies need it?
SPF flattening rewrites DNS lookups in SPF records into a simplified list of IP addresses, ensuring records never exceed the 10-lookup limit. Agencies need it because client infrastructures often rely on multiple mail providers, which can quickly break SPF without flattening.
2. How does AutoSPF differ from PowerSPF and DynamicSPF?
AutoSPF is built for agencies, offering unlimited domain support, bulk management, and real-time flattening. PowerSPF is geared toward enterprise IT/security teams, while DynamicSPF is a basic DNS-level solution that doesn’t scale well for agencies.
3. Can SPF flattening improve email deliverability?
Yes. A failing SPF record leads to DMARC misalignment and rejected emails. Flattening ensures SPF always passes, improving inbox placement and protecting your clients’ sender reputation.
4. Is manual SPF management still viable for agencies?
Not really. With multiple clients and complex infrastructures, manual SPF updates are time-consuming and prone to human error. Agencies that try to manage SPF manually often run into costly deliverability issues.
5. Does AutoSPF support unlimited domains without extra fees?
Yes. Unlike competitors that charge per domain or per record, AutoSPF offers true unlimited SPF flattening across all client domains under a single subscription—making it the most cost-effective choice for agencies.