BioSonic vs Kaleidoscope Pro
Both BioSonic and Kaleidoscope Pro are professional bat sound analysis tools. This page compares their approaches, features, and independent benchmark results to help you choose the right tool for your projects.
In an independent benchmark by Wilder Sensing on 6,126 calls across 15 species, BioSonic scored 98.7% F1 and Kaleidoscope Pro scored 73.0% F1. Below we compare workflow, features, and pricing.
At a glance
| Feature | BioSonic | Kaleidoscope Pro |
|---|---|---|
| Accuracy | 98.7% F1 accuracy (Wilder Sensing benchmark) | 73.0% F1 (same benchmark) |
| Species per recording | Up to 7 | 1 |
| Social / feeding calls | Separated automatically | Combined |
| Platform | Browser-based — works on any computer | Desktop app — Windows, Mac |
| Team access | Unlimited users, shared projects | Single-user licence ($399 USD / £425 inc VAT) |
| Noise filtering | Deep-learning model (4M samples) | Simpler algorithm based on Zero crossing |
| Model updates | New model every weekend | Software version releases |
| Cloud storage | 9 years EU-hosted | BYO / Managed Cloud add-on |
| Report generation | One-click charts, maps, Word | CSV export to Excel |
| Detector compatibility | Any WAV-producing detector | Any WAV + ZC files |
| Geographic coverage | UK, NL, DK, DE, SE, BE, FR, PL, FI, NO | UK, EU, NA, SA, Neotropics |
| Pricing | Per-GB, all-inclusive | $399 USD / £425 inc VAT (single annual subscription) |
AI image recognition on spectrograms
BioSonic converts each recording into a spectrogram image and runs it through a convolutional neural network trained on 2.5 million labelled bat calls. The model sees the full time-frequency picture, detecting multiple species, social calls, and feeding buzzes in a single pass.
Kaleidoscope Pro uses Hidden Markov Models (HMMs) with Fisher scores and winnow classifiers to detect and classify bat calls (Agranat 2013). Classifier updates are tied to software releases, typically every 2–3 years.
Trained on millions of examples
The model is curated by 12 bat experts across five European countries and retrained every weekend. 3.5 million noise files teach the AI to reject rain, wind, insects, and equipment noise before classification.
This is why BioSonic produces 13.4× fewer false positives than Kaleidoscope Pro — the noise model is trained on as many non-bat recordings as bat recordings.
In an independent benchmark by Wilder Sensing, both tools were tested on 6,126 bat calls across 15 species, checked against expert manual identification.
In the Wilder Sensing benchmark, BioSonic produced 13.4× fewer false positives and 16.3× fewer missed bats. On a dataset of 100,000 files, that difference translates to roughly 3,700 fewer phantom detections requiring manual review. Contact us to run a comparison on your own labelled data.
Spectrogram review
Inspect every call visually. Confirm or override AI classifications with right-click bounding boxes. Every decision is logged with a timestamp and user ID.
Kaleidoscope Pro outputs CSV files. Review happens in spreadsheets or by manually opening spectrograms one at a time.
Species heatmaps
See bat activity across your entire site on an interactive map. Filter by species, date, or time of night. One click to export.
Kaleidoscope Pro does not include mapping. You build maps manually from exported data.
Since joining BioSonic our analysis time has reduced significantly. The team is excellent in their support, super quick to respond.
— Luke Waddison, Senior Ecologist, Wharton (UK)
Emergence time analysis
Automatic emergence graphs pinpoint when bats leave roosts. Crucial for roost characterisation reports.
With Kaleidoscope Pro, building emergence graphs requires exporting data and constructing charts manually in Excel.
Weather integration
BioSonic automatically overlays temperature, wind, and rain data on your activity charts. No manual data entry.
Kaleidoscope Pro does not integrate weather data. You source and merge it yourself.
Choose BioSonic
- Consultancy team — more than one person writing reports together
- Work in Europe and want the highest accuracy on European bat species
- Need feeding buzzes and social calls separated automatically
- Want 13× fewer false positives — less time reviewing noise
Choose Kaleidoscope Pro
- Work in North America, South Africa, or the Neotropics — regions BioSonic does not cover yet
- Need to process zero-crossing files from older Anabat detectors
- Prefer working offline on your own computer
Some teams use both — Kaleidoscope for projects outside Europe, BioSonic for European work. The best test is to upload your own recordings to both and compare.
Which is more accurate, BioSonic or Kaleidoscope Pro?
In an independent benchmark by Wilder Sensing, BioSonic achieved a 98.7% F1 score compared to Kaleidoscope Pro's 73.0% on the same dataset of 6,126 calls across 15 species. BioSonic also produced 13.4 times fewer false positives and 16.3 times fewer missed bats. See our benchmarks page for the full data.
Can I switch from Kaleidoscope Pro to BioSonic?
Yes. BioSonic accepts the same WAV files you already record with Wildlife Acoustics detectors (Song Meter, Echo Meter) as well as Batlogger, AudioMoth, Pettersson, and all other standard full-spectrum bat detectors. Upload your existing recordings and get results immediately — no format conversion needed. You can also re-analyse historical datasets. Start a free trial to test it with your own data.
Does BioSonic require software installation?
No. BioSonic runs entirely in your web browser on any operating system. There is nothing to download, install, or update. Kaleidoscope Pro requires a desktop installation on Windows or macOS.
Does BioSonic detect feeding buzzes and social calls?
Yes. BioSonic automatically separates bat vocalisations into echolocation calls, feeding buzzes, and social calls. Kaleidoscope Pro combines social and feeding calls together. For habitat assessments where behaviour classification matters, this distinction is significant.
How many species can BioSonic identify per recording?
BioSonic can identify up to 7 species per recording. This is important for recordings that capture multiple bats passing simultaneously — a common occurrence at roost emergence sites and along commuting corridors. Kaleidoscope Pro’s Auto-ID assigns a single best-match species per recording (a probability list is available in detail mode, but the headline output is single-species). In multi-bat recordings — common at roost emergence sites — this can miss additional species present in the same file.
How often does BioSonic update its AI model?
BioSonic deploys a new AI model every weekend. Each model incorporates the latest training data, expert feedback, and performance improvements. Users do not need to do anything — the updated model is available automatically the following Monday. Kaleidoscope Pro updates only when a new software version is released, which typically happens a few times per year.
Which countries does each tool cover?
BioSonic currently covers the UK, Netherlands, Denmark, Germany, and Sweden, supporting all EUROBATS species in those regions. Coverage is expanding. Kaleidoscope Pro covers a broader geographic range including UK, Europe, North America, South Africa, and the Neotropics. If you work outside BioSonic's current coverage area, Kaleidoscope Pro may be the better option today.
How does pricing compare between BioSonic and Kaleidoscope Pro?
BioSonic uses per-GB-per-year pricing that includes all features, unlimited users, and EU-hosted storage. Contact us for a quote. Kaleidoscope Pro is a single annual subscription — $399 USD direct from Wildlife Acoustics, or £425 inc VAT (£354.17 ex VAT) from NHBS in the UK (May 2026). One licence covers processing; the free viewer can be used for manual vetting. Managed Cloud is available as an optional add-on.
- Agranat, I. (2013). "Automatically identifying animal species from their vocalizations on the Kaleidoscope platform." J. Acoust. Soc. Am. 134(5), doi:10.1121/1.4799403
- Wilder Sensing (2024). Independent benchmark on 6,126 calls across 15 species — full results on our benchmarks page
- NHBS pricing for Kaleidoscope Pro: £425 inc VAT (£354.17 ex VAT), May 2026. Wildlife Acoustics direct: $399 USD.
- Wildlife Acoustics: wildlifeacoustics.com
Last verified: 2026-04-26.
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Ready to try it?
See how BioSonic handles your recordings
Upload a batch of WAVs and compare results against Kaleidoscope Pro. No commitment, no credit card, no installation required.
Questions? Email josef.carlson@biosonic.se