Why This Comparison Matters
Imperva and Flowtriq both claim to protect your infrastructure from DDoS attacks, but they do it in ways that are so architecturally different that comparing them is less like comparing two cars and more like comparing a car to a train. Both get you from A to B, but the infrastructure, cost, and operational model are completely different.
Imperva is an application security company that sells DDoS protection as part of a broader WAF, bot management, and API security platform. Their DDoS protection works by routing your traffic through Imperva's scrubbing network, where attack traffic is filtered and clean traffic is forwarded to your origin. This is the classic cloud scrubbing model: no software on your servers, but all your traffic flows through a third-party network.
Flowtriq takes the opposite approach. A lightweight agent runs on each Linux server, reads every packet directly at the host, detects anomalies in real time, classifies attacks, and responds locally. No traffic redirection, no DNS changes, no scrubbing center latency. The agent sees everything happening on that specific server at one-second granularity.
Neither architecture is universally better. The right choice depends on what you are trying to protect, how much you can spend, and what your operational priorities are.
How Imperva DDoS Protection Works
Imperva offers two DDoS protection products: Application DDoS Protection (for websites and web applications) and Infrastructure DDoS Protection (for IP ranges and non-web services). Both work by routing traffic through Imperva's global network of scrubbing centers.
For Application DDoS Protection, you change your DNS records to point your domain at Imperva's network. All incoming traffic, including attack traffic, first hits Imperva's edge. Their platform inspects the traffic using their threat intelligence, behavioral analysis, and WAF rules, drops attack traffic, and forwards legitimate requests to your origin server. This is the same model used by Cloudflare, Akamai, and other cloud CDN/WAF vendors.
For Infrastructure Protection, you announce a BGP route to Imperva's network using GRE tunneling or direct interconnect. Your IP addresses are advertised from Imperva's scrubbing centers, traffic is cleaned, and legitimate traffic is forwarded to your infrastructure via the tunnel. This model protects non-web services including game servers, DNS infrastructure, and custom protocols.
Imperva's platform combines DDoS mitigation with their WAF, bot management, and API security products. For organizations that need L7 application security alongside DDoS protection, bundling these into a single platform is operationally convenient. Imperva markets this as "application security" rather than pure DDoS protection, and for many buyers that is the real value proposition.
The Latency and Visibility Tradeoff
The cloud scrubbing model has two inherent tradeoffs. First, latency: routing traffic through a third-party scrubbing center adds round-trip time. Imperva's global network minimizes this, and for most web applications the added latency is acceptable (typically 5-20ms). For latency-sensitive applications like real-time APIs, financial trading systems, or game servers, this overhead can be significant.
Second, visibility: because Imperva inspects traffic at the network edge before it reaches your servers, your servers see only clean traffic after scrubbing. You lose visibility into what attack traffic looks like, how it is distributed, and what the attack profile actually is. Imperva's dashboard shows you what their system detected and filtered, but you do not get per-server packet-level forensics.
How Flowtriq Works
Flowtriq deploys a lightweight agent on each Linux server that monitors the network interfaces directly. The agent reads every packet header at the kernel level, builds per-second traffic profiles, maintains a dynamic baseline of normal traffic patterns for that specific server, and detects anomalies against the baseline. No traffic is redirected, no DNS changes are required, and no third-party network sits in the traffic path.
When the agent detects an attack, it classifies it into one of eight attack families: UDP flood, SYN flood, DNS amplification, NTP amplification, ICMP flood, HTTP flood, TCP ACK flood, or multi-vector. Each classification includes a confidence score. The agent fires alerts within one second through your configured channels: Discord, Slack, email, PagerDuty, OpsGenie, SMS, or custom webhooks.
Simultaneously, the agent's PCAP buffer captures the attack in progress, preserving packet data with a configurable pre-attack window. This means you get forensic packet captures from before the attack started. The captures are stored in your dashboard and available for download as standard PCAP files.
For mitigation, Flowtriq's firewall rules engine supports 22 distinct action types: rate limiting by source, protocol, or port; iptables/nftables rule insertion; webhooks to external orchestration; API calls to upstream scrubbing providers; and more. Because Flowtriq knows the attack type, it applies targeted mitigation that keeps the server online for legitimate traffic while blocking attack vectors.
Feature Comparison
| Feature | Imperva DDoS | Flowtriq |
|---|---|---|
| Architecture | Cloud scrubbing proxy | Per-server agent |
| Traffic redirection required | Yes (DNS or BGP) | No |
| Latency added | 5-20ms (scrubbing) | Zero |
| Detection latency | Near real-time | 1 second |
| Attack classification | L3/L4/L7 categories | 8 families + confidence score |
| Per-server visibility | No | Yes |
| PCAP forensics | No | Yes (auto-captured) |
| L7 WAF | Yes (bundled) | No |
| Bot management | Yes (bundled) | No |
| Non-HTTP protocol support | Infrastructure plan only | All protocols |
| Targeted mitigation (no blackhole) | Partial | Yes (22 action types) |
| Alert channels | Email, webhook | 7 channels (Discord, Slack, PD, etc.) |
| Deployment complexity | Medium (DNS/BGP changes) | Low (agent install, 2 min) |
| Pricing transparency | Quote only | $9.99/node/month published |
| Free trial | Demo only | 7-day full-feature trial |
Pricing Comparison
Imperva does not publish pricing on their website. Based on publicly available information, customer reports, and industry analysis, Imperva DDoS Protection pricing typically falls into these ranges:
- Application DDoS Protection: Typically bundled with Imperva's WAF platform. WAF plans start around $59/month for basic website protection and scale to thousands of dollars per month for enterprise traffic volumes. Dedicated DDoS protection for high-traffic sites or SLA-backed plans run $3,000-$15,000+/month.
- Infrastructure Protection: Priced per protected IP subnet and bandwidth commitment. Typical entry-level deployments start at $2,000-$5,000/month. Large deployments protecting multiple /24s with guaranteed scrubbing capacity can exceed $30,000/month.
- Enterprise contracts: Multi-year enterprise agreements with Imperva often include their full platform (WAF, DDoS, bot, API security). These contracts typically run $100,000-$500,000+/year for large organizations.
Flowtriq is $9.99 per node per month on monthly billing, or $7.99 per node per month annually. A 10-node deployment: $99.90/month. A 50-node deployment: $499.50/month. No tiers, no per-GB charges, no traffic surcharges. Every node gets every feature: classification, PCAP, 22 mitigation action types, all 7 alert channels, and the full dashboard. A 7-day free trial is available with no credit card required.
The pricing difference is substantial. For most organizations running servers that need per-server DDoS detection, Flowtriq costs 10-100x less than Imperva. The question is whether you need the additional capabilities that justify Imperva's premium: L7 WAF, bot management, API security, and the brand trust that comes with a major enterprise vendor.
When to Choose Each
Choose Imperva when:
- You need L7 WAF + DDoS protection in a single platform and want to manage one vendor relationship
- You are protecting web applications and can absorb 5-20ms of additional latency
- Your threat model includes sophisticated L7 attacks, bot traffic, and API abuse alongside volumetric floods
- You need compliance certifications (PCI DSS, SOC 2) from your DDoS vendor and prefer established enterprise names
- Your organization already uses Imperva for WAF and wants to extend to DDoS without a new vendor
Choose Flowtriq when:
- You need per-server DDoS detection with one-second granularity and exact attack classification for each individual host
- You protect latency-sensitive services (game servers, real-time APIs, financial systems) where added scrubbing latency is unacceptable
- You need PCAP forensics automatically captured for every attack incident
- You want targeted mitigation that keeps servers online during attacks, not proxy routing that can disrupt traffic flow
- You are protecting non-HTTP services (game protocols, custom UDP, bare-metal infrastructure) where a web proxy model does not apply
- You want transparent, per-node pricing without enterprise contracts or bandwidth commitments
Using Both Together
For organizations that need both L7 application security and deep per-server detection, using Imperva and Flowtriq together makes sense. Imperva handles L7 WAF rules, bot mitigation, and volumetric scrubbing at the CDN edge. Flowtriq handles the per-server detection layer: catching attacks that bypass or precede scrubbing, providing PCAP evidence, classifying every incident, and triggering local mitigation responses.
In practice, this means Imperva absorbs large volumetric floods at the edge before they saturate your transit links, while Flowtriq gives you forensic depth and server-level visibility that Imperva's proxy model cannot provide. You see exactly which servers are being targeted, what the attack profile looks like at the packet level, and you have a full incident history with PCAP evidence for every event.
Migrating from Imperva to Flowtriq
If you are currently using Imperva and considering switching to Flowtriq for server-level DDoS protection, the migration process is straightforward:
- Deploy Flowtriq agents in parallel. Install the Flowtriq agent on your servers while Imperva is still active. The agent runs independently and does not interfere with Imperva's traffic routing. You will immediately begin seeing per-server traffic data and baselines forming.
- Let baselines mature. Flowtriq builds dynamic traffic baselines over the first 24-72 hours on each server. After this period, detection accuracy is at its best. Do not cut over until baselines are established.
- Configure alert channels and mitigation rules. Set up your Discord, Slack, PagerDuty, or other notification channels. Configure firewall rules for the attack types most relevant to your infrastructure.
- Run in parallel and verify. Keep Imperva active while Flowtriq runs alongside. Compare incident data. Verify that Flowtriq is catching what Imperva catches plus additional per-server events that Imperva's model cannot see.
- Transition DNS/BGP. When you are confident in Flowtriq's coverage, revert your DNS records or BGP announcements to route directly to your infrastructure rather than through Imperva's scrubbing network. Your traffic latency will drop immediately.
Organizations migrating from Imperva WAF should evaluate whether they need a separate WAF solution for their applications. Flowtriq focuses on network-level DDoS detection rather than application-layer WAF rules. If L7 WAF is a hard requirement, consider keeping Imperva WAF while replacing Imperva DDoS with Flowtriq's per-server detection layer.
Frequently Asked Questions
Can I switch from Imperva DDoS Protection to Flowtriq?
Yes. The migration is straightforward: install the Flowtriq agent on your servers, let baselines form over 24-72 hours, configure your alert channels and mitigation rules, then revert your DNS or BGP announcements back to direct routing. Flowtriq does not require DNS changes or traffic redirection, so the cutover can be done incrementally with zero downtime. If you also use Imperva WAF and need to keep L7 application security, you can remove only the DDoS scrubbing component while retaining WAF functionality.
Does Flowtriq protect against L7 application-layer DDoS attacks?
Flowtriq detects HTTP floods as one of its eight attack families and can trigger mitigation actions at the server level. However, Flowtriq is a network-level detection tool, not a full L7 WAF. It does not inspect HTTP request bodies, apply WAF rules, or perform bot fingerprinting. For sophisticated L7 attacks (slowloris, low-and-slow HTTP floods, sophisticated bot traffic), a dedicated WAF or reverse proxy like Cloudflare or Imperva provides more granular application-layer controls. Flowtriq and a WAF are complementary, not competing.
How does Flowtriq's pricing compare to Imperva for small deployments?
For small deployments (under 20 servers), Flowtriq is dramatically cheaper. At $9.99/node/month, 10 servers cost $99.90/month. Imperva's entry-level DDoS protection for comparable infrastructure typically starts at $500-$2,000/month for basic coverage. For large web applications with high traffic volumes, Imperva's pricing scales with traffic and the gap narrows, but Flowtriq's flat per-node model remains predictable regardless of attack volume or traffic spikes.
Does Flowtriq add latency to my traffic?
No. Flowtriq's agent monitors traffic passively at the network interface. It does not sit in the traffic path, does not proxy connections, and does not redirect traffic. Your packets travel directly from client to server with zero additional latency. This is the fundamental architectural difference from cloud scrubbing solutions like Imperva.
Can Flowtriq work alongside Imperva Infrastructure Protection?
Yes. Imperva Infrastructure Protection handles volumetric scrubbing at the network edge using BGP diversion. Flowtriq runs on your servers and provides per-server detection depth that Imperva's scrubbing model cannot deliver. The two layers are complementary: Imperva absorbs large floods before they reach your transit links, Flowtriq gives you per-server forensics, PCAP evidence, and targeted mitigation for attacks that originate on or after your infrastructure boundary.
Per-server DDoS detection. No scrubbing latency.
One-second detection, 8-family classification, automatic PCAP capture, and 22 mitigation action types. $9.99/node/month with a 7-day free trial, no credit card required.
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