Bluejay vs. Cekura
Bluejay reports 27 speech-quality metrics and ships security red-teaming reports mapped to OWASP LLM Top 10 and MITRE ATLAS, supporting the case for investigating speech and security failures together. At $500 a month, Bluejay Growth includes up to 100 concurrent simulations and unlimited seats, twice the concurrent allowance of Cekura's Startup plan (50 concurrent calls, 10 seats) at the same price.
Read the full multilingual testing breakdown →
Last updated September 10, 2026
In production with teams like these
Bluejay and Cekura both test conversational voice agents before they reach production, but the gap between them shows up most in how much of the real world each platform actually simulates. Cekura's testing is built around a defined set of persona and workflow scenarios: four accent presets (US, UK, Indian, German), configurable tones, and predefined workflow validation. Bluejay is built around a broader premise: auto-generate hundreds of real-world variables, including dozens of languages, accents, and code-switching patterns, directly from your own customer data, then carry that same testing infrastructure into production monitoring.
That difference compounds at scale. Word error rates for non-native English speakers can run 200–300% higher than for native speakers on standard ASR systems, and that gap doesn't show up as a red flag on a dashboard. It shows up as a caller whose booking silently failed to go through. If your test suite only exercises the accents on a preset list, you won't see those failures until real customers hit them.
Methodology note: the capability comparisons on this page reflect Bluejay's own product, usage data, and customer results, cross-referenced against Cekura's publicly documented product focus (persona- and workflow-based testing with four accent presets) and Cekura's own published pricing page. We don't have access to Cekura's internal benchmarks or accuracy numbers, so where we can't independently verify a specific Cekura figure, we describe its focus qualitatively instead of inventing one.
- Bluejay reports 27 speech-quality metrics and ships security red-teaming reports mapped to OWASP LLM Top 10 and MITRE ATLAS, supporting the case for investigating speech and security failures together.
- At $500/month, Bluejay Growth includes up to 100 concurrent simulations and unlimited seats. Cekura's Startup plan includes 50 concurrent calls and 10 seats at the same price, twice the concurrent allowance, not a claim that tests finish twice as fast.
- Bluejay simulates 500+ real-world variables, including 70+ languages and dialects and 24+ accents, where Cekura's public documentation describes four preset accent personas (US, UK, Indian, German).
Where Bluejay pulls ahead
| Capability | Bluejay | Cekura |
|---|---|---|
| Accent personas | 500+ variables | 4 presets (US, UK, Indian, German) |
| Language coverage | Dozens of languages with code-switching | Limited to preset accents |
| Auto-generated scenarios | Yes, from customer data | Manual configuration required |
| Scale | 24M+ conversations annually | Thousands of scenarios |
| Security red teaming | OWASP- and MITRE-aligned, with a PDF report | Not published |
| Concurrent simulations at $500/mo | 100 (Growth), unlimited seats | 50 (Startup), 10 seats |
Bluejay Growth includes up to 100 concurrent simulations and unlimited seats for $500/month (pricing). Cekura Startup includes 50 concurrent calls and 10 seats for $500/month (Cekura pricing). That's twice the concurrent allowance, not a claim that tests finish twice as fast.
Language and accent coverage, in detail
Bluejay analyzes 10M+ minutes of conversation across 70+ languages and dialects and 24+ accents (plus custom, clone, and generate options), simulating 500+ real-world variables including accents, background noise, and emotional state. Cekura's public documentation describes four preset accent personas. Here's why that gap matters in practice.
| Accent | Typical word error rate | Business impact |
|---|---|---|
| Standard American | 5–8% | Baseline performance |
| Indian English | 8.1–15% | 2–3x higher failure rate |
| Nigerian English | 12.4% | Significant task completion drop |
| Chinese English | 25–30% | 5–6x higher than baseline |
Source: aggregated third-party ASR accent benchmark data cited in Bluejay's multilingual testing breakdown (linked above). These are industry-wide ASR benchmarks, not a claim about any specific vendor's model.
| Coverage dimension | Bluejay | Cekura |
|---|---|---|
| Accent personas | 24+ accents, plus custom, clone, and generate | 4 presets (US, UK, Indian, German) |
| Language coverage | 70+ languages and dialects, with code-switching | Limited to preset accents |
| Scenario generation | Auto-generated from your own customer data | Manual configuration of personas and workflows |
| Audio-quality metrics measured | 27 metrics, on both the agent and caller channel | Not published at this depth |
| Annual conversation volume analyzed | ~24M conversations/year | Not published |
Bluejay's public documentation currently lists a smaller baseline set of accents; the number available in practice, across custom, clone, and generate options, is considerably higher. We don't have visibility into Cekura's internal accuracy numbers, so the Cekura column reflects its publicly documented feature set rather than an estimated benchmark.
Real example: the Washington State Department of Licensing added a Spanish-language phone option that instead played an English voice with a Spanish-accent glitch rather than actual Spanish. The department pulled the feature and issued a public apology. Structured testing across real accent and language variables, not just a handful of presets, is what catches that kind of failure before launch instead of after a public rollback.
Why teams choose Bluejay over Cekura
Test the accents your real callers have
500+ auto-generated variables across accents, languages, and code-switching, versus four fixed presets.
Security testing built in, not bolted on
OWASP- and MITRE-aligned red teaming ships with a PDF report for every release.
Twice the concurrent testing capacity
Bluejay Growth includes up to 100 concurrent simulations and unlimited seats for $500/month. Cekura Startup includes 50 concurrent calls and 10 seats at the same price, twice the concurrent allowance, not a claim about test speed.
Best use cases for Bluejay
Where the gap between preset-based testing and full-spectrum simulation shows up most.
Your callers speak more than four accents
Bluejay simulates 500+ real-world variables including 70+ languages and dialects and 24+ accents (plus custom, clone, and generate options), auto-generated from your own customer demographics rather than hand-configured one at a time.
How Cekura compares: Cekura's public documentation describes four preset accent personas (US, UK, Indian, German). If your traffic spans more dialects than that, Cekura's preset library won't exercise the failure modes your real callers create.
You need to measure audio quality, not just pass or fail a scenario
Bluejay measures 27 speech-quality metrics (word error rate, pronunciation, pitch, words per minute, clarity, clipping, dropouts, noise, packet loss, loudness, and reverb) on both the agent and the caller channel.
How Cekura compares: Cekura's public materials focus on workflow and persona-based scenario testing with real-time dashboards; that level of granular, dual-channel audio-quality scoring isn't part of its published feature set.
You need security red teaming alongside functional testing
Bluejay's red-teaming is mapped to OWASP and MITRE frameworks and ships with a PDF report your security team can hand to auditors, in the same platform where you run functional and accent testing.
How Cekura compares: Cekura's documented strengths are around workflow validation and production monitoring; we haven't seen a published OWASP/MITRE-aligned red-teaming capability in its public materials.
You want simulation and production monitoring in one place
Bluejay covers pre-launch simulation and 100% of production conversations, with real-time alerting on both functional failures and accent- or language-specific degradation, without switching tools mid-pipeline.
How Cekura compares: Cekura also offers production monitoring with real-time alerts and dashboards; the difference is in how much of the real-world variable space (accents, languages, audio quality) that monitoring is built to segment by.
Best use cases for Cekura
In fairness, here's where a narrower, preset-based tool can be the right call.
Your caller base is genuinely limited to a handful of accents
If your product only serves callers in markets covered by a small set of well-known accents, and you don't expect that to change, a platform scoped to a fixed set of presets can be simpler to configure than one built for open-ended accent generation.
How Bluejay compares: Bluejay's presets still cover that same narrow case, and the accent and language library scales with you if your caller base grows into new markets, without a platform switch.
You mainly need predefined workflow and persona scenarios
Teams whose testing needs are centered on validating a fixed set of workflows (like impatient callers or appointment cancellations) with configurable tones and a small persona set may find that scope easier to set up for a narrow initial use case.
How Bluejay compares: Bluejay supports the same kind of workflow- and persona-based scenarios, generated automatically from your own SOPs and customer data, so you get that coverage without giving up the option to expand into broader accent and audio-quality testing later.
Bluejay's platform gives us total confidence in the robustness of our systems, helping us become faster and more accurate. They are a core part of our stack.
Team access and testing capacity
Two dimensions worth checking before you commit to a platform: who on your team can actually use it, and how much testing you can run at once.
| Dimension | Bluejay | Cekura |
|---|---|---|
| Seats included per plan | Unlimited seats and agents on every plan, including Pay-as-you-go | 10 seats on Startup ($500/mo). Other tiers not published |
| Concurrent simulations, entry plan | Up to 25 concurrent on Pay-as-you-go ($0/mo plus usage) | Not published |
| Concurrent simulations, mid-tier | Up to 100 (Growth, $500/mo) or 200 plus load testing (Scale, $1,000/mo) | 50 concurrent calls on Startup ($500/mo) |
| Concurrent simulations, Enterprise | Custom, into the thousands | Not published |
| Data retention | 14 days (entry) up to 90 days (Scale), custom on Enterprise | Not published |
Bluejay publishes exact seat counts and concurrency ceilings for every plan, including the free one. At the same $500/month tier, Bluejay's Growth plan includes up to 100 concurrent simulations and unlimited seats, against Cekura's Startup plan at 50 concurrent calls and 10 seats, twice the concurrent allowance, not a claim about test speed. We don't have visibility into Cekura's other published tiers, so we've left those cells blank rather than guess.
Bluejay platform overview
Accent and language coverage is one piece of a broader platform. Here's what else is included on every plan.
Simulation & test generation
12 test types, including natural language, goal adherence, replay-from-transcript, workflow-based tests generated from SOPs and diagrams, customer journeys, voicemail testing, full IVR-tree simulation, and load testing.
Audio-native quality scoring
27 speech-quality metrics (including word error rate, pronunciation, pitch, and words per minute), measured on both the agent and the caller side of the call.
Security red teaming
Red-teaming mapped to OWASP and MITRE frameworks, with a PDF report your security team can hand to auditors or leadership.
Production monitoring
Real-time failure alerting, latency at p50/p95/p99, deterministic evaluations, and LLM-based evaluations (CSAT prediction, compliance flags, hallucination detection) on 100% of conversations.
Any channel, any modality
Voice, chat, SMS, IVR, and email, plus human agents alongside AI ones, so CX insight lives in one platform instead of split across tools.
Developer-native workflows
MCP server for Claude Code, Claude Desktop, Cursor, and Windsurf; a CLI (npx run bluejay); GitHub Actions; and a full public API with webhooks.
How to choose
A quick way to map your situation to a platform.
| If this describes you… | Choose |
|---|---|
| Your callers span more accents or languages than a handful of presets | Bluejay |
| You need dual-channel audio-quality metrics like word error rate and clarity | Bluejay |
| You need OWASP/MITRE-aligned security red teaming with a report | Bluejay |
| Your caller base is fixed and covered by a small preset list | Either |
| You mainly need predefined workflow and persona validation | Either |
| You want simulation and production monitoring in one platform | Bluejay |
Switching from Cekura to Bluejay
Most teams run this in parallel with their existing setup before cutting over fully.
-
Start on the free plan
Sign up self-serve. Pay-as-you-go is $0/month plus usage, with $25 in free credits and the full platform available from day one.
-
Connect your agent
Bluejay integrates with Phone, SIP, WebSocket, LiveKit, Pipecat, ElevenLabs, Retell, Vapi, Amelia, Google CES, Dialogflow CX, and Bland for voice, plus SMS, HTTP webhook, Kore.ai, and more for chat.
-
Bring over your test scenarios
Rebuild your persona and workflow tests as natural-language or replay-from-transcript scenarios, or generate new ones from your SOPs and customer data. Then run both platforms side by side to compare results.
-
Turn on production monitoring
Enable monitoring across 100% of conversations with real-time Slack or PagerDuty alerts, segmented by accent and language where it matters most.
-
Expand into security and load testing
Add OWASP/MITRE-aligned red-teaming and load testing up to 200 concurrent calls on public plans (custom, into the thousands, on Enterprise) once the core migration is done.
Frequently asked
Why does accent coverage matter this much?
Word error rates can run 200–300% higher for non-native English speakers on standard ASR systems. If your test suite only covers a handful of accents, you won't see those failures until real customers hit them.
Can Bluejay auto-generate test personas from our own customer data?
Yes. Bluejay builds persona matrices automatically from real customer demographics, so you don't have to hand-configure every accent and scenario.
Does Bluejay test languages and accents beyond what's documented publicly?
Yes. Bluejay's public documentation currently lists a smaller baseline set of accents, but the platform actively supports 70+ languages and dialects and 24+ accents, plus custom, clone, and generate options for anything not already in the library.
What compliance certifications does Bluejay have?
SOC 2 Type II is complete, alongside HIPAA, GDPR, a signed BAA, and a DPA. Data is encrypted in transit (TLS 1.2+) and at rest (AES-256), access follows least-privilege reviewed quarterly, and customer data is never used to train or fine-tune AI models.
How does pricing compare to Cekura?
Bluejay publishes four self-serve plans starting at $0/month plus usage, with unlimited seats and agents on every plan. At the same $500/month price point, Bluejay's Growth plan includes up to 100 concurrent simulations, compared to Cekura's Startup plan at 50 concurrent calls and 10 seats, twice the concurrent allowance, not a claim about test speed.
Does Bluejay support the same workflow- and persona-based testing style as Cekura?
Yes. Natural-language, goal-adherence, and workflow-generated scenarios cover that same use case, but they sit alongside broader accent, language, and audio-quality testing rather than being the whole product.
