Comparison of Trend V1FSS usage-based pricing with conventional services
Introduction
Hello, I'm Shima.
Are you implementing malware scanning for S3? Trend Micro offers a security service called "Trend Cloud One File Storage Security (hereafter C1FSS)" that provides malware scanning functionality for Amazon S3 files. And now, "Trend Vision One File Security Storage (hereafter V1FSS)" has been released as the successor to C1FSS. Additionally, as an AWS native service, there is "Amazon GuardDuty Malware Protection for S3 (hereafter GuardDuty S3)".
In this article, I will explain the pay-as-you-go pricing for V1FSS and compare it with the pricing of traditional C1FSS and GuardDuty S3.
V1FSS Pricing Structure
V1FSS offers a credit-based system, but this time I'll explain the simpler and more straightforward pay-as-you-go model.
Pay-as-you-go Model
There are two pricing structures for the pay-as-you-go model.
- Scan Unit Price: $0.013 per scan
- Bucket Unit Price: $1.155 per hour
Guidelines for Price Selection
When using bucket protection, there are guidelines for choosing which pricing structure to use.
- Less than 89 files per hour: Scan unit price ($0.013 × number of files) is cheaper
- 89 files or more per hour: Bucket hourly rate ($1.155/hour) is cheaper
89 files is the branching point when selecting a billing method.
Comparison with Traditional Services
Cloud One File Storage Security (C1FSS)
The traditional C1FSS used a tiered pricing structure.
- 1-20 files/hour: Free
- 21-200 files/hour: $0.42
- 201-400 files/hour: $0.63
- 401-2000 files/hour: $1.155
GuardDuty S3
A significant price reduction was implemented by AWS around February 2025.
- Tokyo Region: $0.79/GB → $0.1185/GB (85% reduction)
GuardDuty S3 charges for both "scanned data volume ($0.1185/GB/month)" and "number of evaluated objects ($0.282/1,000 objects/month)".
Price Comparison Simulation
Very Small Environment (20 files per hour, file size 1MB)
| Service | Price | Notes |
|---|---|---|
| C1FSS | $0.00/hour | Free tier (1-20 files/hour) |
| GuardDuty S3 | $0.01/hour | Data volume charge + object count charge |
| V1FSS | $0.26/hour | When selecting scan unit price ($0.013×20 files) |
C1FSS is the most cost-effective. If you have 20 files/hour or less, it can be used completely free, making it optimal for small projects or test environments.
Small Environment (200 files per hour, file size 1MB)
| Service | Price | Notes |
|---|---|---|
| GuardDuty S3 | $0.08/hour | Data volume charge + object count charge |
| C1FSS | $0.42/hour | 21-200 files/hour pricing tier |
| V1FSS | $1.155/hour | When selecting bucket unit price |
GuardDuty S3 offers the best cost performance.### Medium-scale environment (400 files per hour, file size 10MB)
| Service | Cost | Notes |
|---|---|---|
| GuardDuty S3 | $0.59/hour | Data volume charge + object count charge |
| C1FSS | $0.63/hour | Price tier for 201-400 files/hour |
| V1FSS | $1.155/hour | When selecting bucket pricing |
GuardDuty S3 offers the best cost performance.
Large-scale environment (2000 files per hour, file size 10MB)
| Service | Cost | Notes |
|---|---|---|
| V1FSS | $1.155/hour | When selecting bucket pricing |
| C1FSS | $1.155/hour | Price tier for 401-2000 files/hour |
| GuardDuty S3 | $2.93/hour | Data volume charge + object count charge |
For large-scale environments with 2000 files/hour, V1FSS and C1FSS are the most economical. GuardDuty S3 becomes cost-disadvantageous at this scale as the price increases significantly with larger file sizes.
*Note: Large-scale scanning requires thorough verification including performance impacts.
Features of each service
C1FSS
Advantages
- Free tier available for 20 files/hour or less
- Most cost-efficient for large environments (2000 files/hour), equivalent to V1FSS
Disadvantages
- EOL announced for August 28, 2025, with support ending December 31, 2026
V1FSS
Advantages
- Officially recommended by Trend Micro as the successor to C1FSS
- Enables multi-cloud and integrated management using Vision One XDR
- Automatic implementation of malicious file isolation via CloudFormation provided by Vision One
- Most cost-efficient for large environments (2000 files/hour), equivalent to C1FSS
Disadvantages
- Higher cost than GuardDuty S3 or C1FSS for small and medium-scale environments
- Less flexibility in Marketplace contract arrangements compared to C1FSS
GuardDuty S3
Advantages
- Easy to start from the AWS management console as it is an AWS native service
- Best cost performance for small to medium-scale environments (200-400 files/hour)
Disadvantages
- Scan results are only attached as tags, requiring custom implementation for subsequent processes
- Cost increases with larger file sizes, becoming disadvantageous for large-scale environments
Summary
I compared V1FSS pay-as-you-go pricing with traditional services. Since C1FSS support will end on December 31, 2026, existing users need to consider migration options. When considering implementation, it's important to understand your current file sizes and scanning frequency, and conduct price simulations for each service. Beyond simple pricing, I recommend making a comprehensive decision that includes functionality, operations, and compatibility with existing systems.
I hope this article is helpful to you.