940 Mbps
Fastest Download (Verizon Fios)
7 ms
Lowest Ping (SoftBank Japan)
2.3x
Fiber vs Cable Speed Gap
73%
Cable ISPs Under Advertised
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Q1 2026: The State of ISP Performance

Fiber continues to dominate every measurable category. The top five global ISPs in our index are all fiber providers, delivering near-symmetrical gigabit speeds with sub-15ms latency. This is not surprising — fiber optic infrastructure does not share bandwidth between neighbors the way cable and DSL do, making it fundamentally more consistent under load.

The real story this quarter is the widening gap between fiber and cable. Fiber ISPs in our dataset average 890 Mbps downstream with 670 Mbps upstream. Cable providers average 310 Mbps downstream but only 30 Mbps upstream — a 22:1 download-to-upload ratio compared to fiber's 1.3:1. As remote work, video conferencing, and cloud backup become the norm, this upload disparity matters more than ever.

Key Findings from Our Data

Showing 20 providers
# Provider Avg. Download Avg. Upload Median Ping Jitter Score
1
Fiber (FTTH) • US
940 Mbps
880 Mbps
8 ms 0.4 ms A
2
Fiber (FTTH) • US
920 Mbps
900 Mbps
10 ms 0.5 ms A
3
Fiber (FTTH) • US
910 Mbps
890 Mbps
9 ms 0.4 ms A
4
Fiber (FTTH) • ASIA
850 Mbps
820 Mbps
7 ms 0.3 ms A
5
Fiber (FTTH) • EU
920 Mbps
700 Mbps
11 ms 0.9 ms A
6
Fiber (FTTH) • EU
900 Mbps
110 Mbps
12 ms 1.1 ms A
7
Fiber (FTTH) • ASIA
880 Mbps
860 Mbps
8 ms 0.4 ms A
8
Fiber (FTTH) • ASIA
920 Mbps
900 Mbps
6 ms 0.3 ms A
9
Fiber (FTTH) • EU
580 Mbps
240 Mbps
14 ms 1.4 ms B
10
Cable (DOCSIS) • EU
500 Mbps
40 Mbps
18 ms 3.2 ms B
11
Cable (DOCSIS) • US
350 Mbps
35 Mbps
24 ms 4.2 ms B
12
Cable (DOCSIS) • US
310 Mbps
25 Mbps
28 ms 5.1 ms B
13
Cable (DOCSIS) • US
280 Mbps
30 Mbps
26 ms 4.8 ms B
14
Cable (DOCSIS) • EU
350 Mbps
36 Mbps
22 ms 4.5 ms B
15
Fixed Wireless / 5G • US
250 Mbps
35 Mbps
30 ms 6.5 ms C
16
Fixed Wireless / 5G • US
200 Mbps
30 Mbps
38 ms 8.2 ms C
17
Fiber (FTTH) • ASIA
240 Mbps
20 Mbps
18 ms 2.8 ms C
18
Fiber (FTTH) • ASIA
110 Mbps
20 Mbps
22 ms 3.8 ms C
19
DSL / VDSL • US
45 Mbps
5 Mbps
42 ms 9.2 ms D
20
DSL / VDSL • US
35 Mbps
4 Mbps
48 ms 11.5 ms D

Understanding the Scores

Our ISP scoring system uses a weighted composite of four metrics to produce a single grade from A (best) to D (needs improvement):

Only ISPs with a minimum of 500 verified tests per quarter are included. Tests are validated by IP lookup to confirm the ISP identity and filtered for anomalies (VPN usage, proxy connections, incomplete tests). For full details, read our Empirical Testing Policy.

Fiber vs. Cable vs. Fixed Wireless: How They Compare

If you are choosing between ISPs or considering switching, here is what the data actually shows about each connection type:

Fiber (FTTH)

Fiber-to-the-home connections deliver the most consistent performance across all metrics. Download and upload speeds are nearly symmetrical, latency stays under 15ms even during peak hours, and jitter is negligible. The only downside is availability — fiber is still not available in many rural and suburban areas. In our data, fiber ISPs average: 890 Mbps down, 670 Mbps up, 10ms ping, 0.7ms jitter.

Cable (DOCSIS 3.1)

Cable internet offers strong download speeds but suffers from dramatically lower upload speeds due to the asymmetric design of DOCSIS. During peak evening hours, cable connections in shared neighborhoods show the greatest degradation — download speeds can drop 15-25% from off-peak measurements. Average: 310 Mbps down, 30 Mbps up, 26ms ping, 4.7ms jitter.

Fixed Wireless / 5G Home

5G home internet has improved significantly over the past year. Median latency dropped from 44ms to 32ms as carriers densified their tower infrastructure. However, performance varies dramatically by location — users close to a 5G tower may see 300+ Mbps while those at the cell edge may get under 50 Mbps. Average: 190 Mbps down, 28 Mbps up, 35ms ping, 7.8ms jitter.

Frequently Asked Questions

What is the fastest ISP in the United States in 2026?
Based on aggregated VelocityVerify speed test data from Q1 2026, Verizon Fios delivers the fastest real-world speeds in the US with an average download of 940 Mbps, upload of 880 Mbps, and a median ping of 8ms. AT&T Fiber and Google Fiber are close behind, all three earning an A score. Among cable providers, Comcast Xfinity leads with 350 Mbps average download.
How is the ISP Performance Index calculated?
The VelocityVerify ISP Performance Index aggregates anonymized speed test results from real users. Each ISP must have a minimum of 500 tests per quarter. The overall score is a weighted composite: download speed (40%), upload speed (20%), median latency (25%), and jitter stability (15%). Tests are validated by IP lookup to confirm ISP identity. For full methodology, see our Empirical Testing Policy.
Why is my ISP ranked lower than expected?
Our rankings reflect real-world user conditions, not lab tests or ISP-advertised speeds. Network congestion during peak hours, shared cable infrastructure, distance from the nearest node, and router quality all affect actual performance. Cable ISPs in particular show significant gaps between advertised and measured speeds — 73% tested below their plans during peak hours in our Q1 2026 data.
What is the difference between fiber and cable ISP performance?
Fiber delivers near-symmetrical speeds (upload matches download) with sub-15ms latency and minimal jitter. Cable ISPs deliver strong download speeds but dramatically lower upload speeds — often a 10:1 ratio. Cable latency runs 20-30ms median with greater jitter due to shared neighborhood bandwidth that degrades during peak hours.
Data Methodology: Rankings are derived from anonymized, aggregated speed test results run on VelocityVerify between October 2025 and March 2026. Only tests where the ISP was positively identified via client IP lookup are included. Results reflect real-world user conditions, not lab or ISP-controlled environments. Minimum sample threshold: 500 tests per provider per quarter. Data is updated quarterly. For our full testing methodology, see our Empirical Testing Policy. If you are a journalist or researcher seeking granular data access, contact us.
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