Charleston’s broadband scene has exploded. Two aging cable monopolies have become five gig-class contenders, each flashing up to 5 Gbps downloads and near-gig uploads. Great news if you work from home, stream on Twitch, or need cloud backups done before bed. But raw-speed headlines ignore real-world variables—upload caps, block-by-block fiber reach, promo pricing, gear fees, and install queues. In this 2026 guide, we compare every Charleston gigabit internet provider on price, typical performance, latency, and coverage so you can pick a plan and get back online fast.
Charleston gigabit providers compared at a glance
The table below lists each qualifying ISP’s core gigabit plan, typical FCC-reported performance, and estimated city reach. All figures were sourced from broadband labels or provider disclosures, verified on August 4, 2026.
| Provider | Last-mile tech | Non-promo 1 Gig price* | Typical speed (↓ / ↑) | Typical latency | Contract | Data policy | Approx. city reach† |
| WOW! | DOCSIS 3.1 cable | $70 | 1,006 / 57 Mbps | 8 ms | None | Unlimited | ≈ 60 percent |
| AT&T Fiber | FTTH | $90 | 999.6 / 946.9 Mbps | 10.7 ms | None | Unlimited | ≈ 43 percent |
| IQ Fiber | FTTH | $85 | 1,022 / 1,022 Mbps | 10 ms | None | Unlimited | ≈ 1 percent (growing) |
| Xfinity | DOCSIS 3.1 cable | From $50** | Up to 1,200 / 35–250 Mbps | ≈ 15 ms | None | Unlimited with five-year guarantee | ≈ 98 percent |
| Home Telecom | FTTH (select areas) | Address quote | Up to 5 Gbps symmetric | ≈ 10 ms | Varies | Unlimited | ≈ 8 percent |
- Prices exclude taxes and one-time fees.
** Five-year price-guarantee bundle; exact checkout price varies by address.
† Coverage percentages combine the FCC December 2025 map with 2026 spot checks; treat them as directional only.
Always run an address check before ordering, because Charleston fiber routes can flip from one side of the street to the other, and cable node upgrades follow their own timelines.
1. WOW! – Best overall gigabit value and lifetime price certainty
WOW! Charleston gigabit internet plan page screenshot
WOW!’s 1 Gig cable tier reports 1,006 Mbps down, 57 Mbps up, and about 8 ms evening latency in its October–December 2025 network-management disclosure (verified August 4, 2026). That performance matches many entry-level fiber plans while costing $70 per month before taxes.
Stability is the bigger draw. Add the optional price-lock fee, a $5 monthly charge, and the base rate stays fixed while you keep the same speed tier. A DOCSIS 3.1 modem comes included; whole-home eero mesh adds $9.99 if desired.
Uploads are asymmetric, but 50+ Mbps still covers multi-party Zoom calls, large photo uploads, and nightly cloud backups. In West Ashley, James Island, and parts of Mount Pleasant where WOW!’s hybrid fiber-coax lines already reach, the mix of predictable billing, solid throughput, and single-digit latency makes it a smart first quote when fiber service is absent on your block; WOW!’s Charleston, SC internet provider page lists the current ZIP codes it serves and lets you confirm eligibility in seconds.
2. AT&T Fiber – Best established option for symmetric uploads
AT&T’s 1 Gig fiber label shows 999 Mbps down, 947 Mbps up, and 10.7 ms evening latency (FCC broadband label captured August 4, 2026). With nearly identical upstream speed, creators move large video files quickly, remote edits stay responsive, and homelab backups finish promptly. The 5 Gig tier shifts the bottleneck to local hardware rather than the WAN link.
The price is clear: $90 per month for 1 Gig, gateway included, with no data cap or annual contract. Introductory credits may trim the first bill, and the standard rate returns after the promotion ends.
AT&T Fiber now passes about 43 percent of Charleston addresses, so availability trails cable. Where service is live, it offers a proven, upload-friendly connection for gamers, streamers, and anyone tired of stalled progress bars.
3. IQ Fiber – Best new all-in fiber value
IQ Fiber skips teaser rates and hidden fees. Its price card shows $85 for 1 Gig, $95 for 2 Gig, and $125 for 5 Gig, and each figure already covers Wi-Fi 7 mesh equipment, professional installation, taxes, and every recurring fee (broadband label accessed August 4, 2026).
Performance matches the straightforward billing. The 1 Gig label lists 1,022 Mbps down, 1,022 Mbps up, and latency up to 10 ms, so a 20-GB video archive uploads in minutes, and online headshots post instantly.
Reach remains the only catch. IQ’s December 2025 FCC filing showed service to roughly 1 percent of Charleston addresses. Crews have been extending the footprint since a local operations center opened in May 2026, yet availability still depends on your block.
When the address checker turns green, IQ Fiber’s symmetric speed and all-in pricing make it a clear choice.
4. Xfinity – Best availability and five-year price guarantee
Xfinity serves about 98 percent of Charleston addresses (FCC December 2025 map, confirmed by sample checkouts on August 4, 2026), making it the metro’s default wired option. A current promotion locks the gigabit tier “from $50 per month” for five years, gateway rental and unlimited data included, giving renters and homeowners a rare shield against annual bill creep.
Performance has improved on upgraded nodes. Many now support 1.2 Gbps down and up to 250 Mbps up, with typical evening latency near 15 ms. Because upload speed depends on local hardware, check your address before planning high-bit-rate streams.
Installation is straightforward. Self-install kits ship at no charge; a professional visit usually costs about $40. Bundles for mobile service, streaming TV, or home security can consolidate bills if you prefer a single provider.
Xfinity still trails fiber on latency and symmetric uploads, yet its blanket coverage and five-year rate guarantee keep it near the top for households that value availability and predictable pricing.
5. Home Telecom – Best local fiber in select communities
Home Telecom lights fiber in parts of Daniel Island, Summerville, and several master-planned neighborhoods. Where service is active, customers report quick installations, hometown support, and symmetric tiers that reach up to 5 Gbps (provider listing captured August 4, 2026).
Pricing varies by address, yet recent invoices in the Home Telecom user forum place the 1 Gig tier in the mid-$80 range, including whole-home Wi-Fi 6 and network-level security. Plans carry no contract and no data cap, and a local tech crew often handles same-day repairs.
Coverage remains limited. About 8 percent of Charleston addresses qualified in the FCC December 2025 release. If the curbside box on your lot bears a Home Telecom logo, you have one of the metro’s fastest symmetric options; otherwise, keep the provider on your watch list because its expansion often follows new construction permits in Berkeley and Charleston counties.
Frequently asked questions
Is fiber internet available at my Charleston address?
Often, because nearly half of city addresses qualify, yet you should verify twice. Start with the FCC National Broadband Map, then run address lookups on at least two providers, since fresh builds can appear on checkout pages months before the map updates.
Who offers the fastest residential speed in Charleston?
On paper, AT&T Fiber and IQ Fiber each sell 5 Gbps symmetric tiers (broadband labels captured August 4, 2026). You need 2.5 GbE or faster LAN hardware to see more than about 940 Mbps on a single device.
Does WOW! run fiber to homes?
Not currently. Its Charleston gigabit product rides hybrid fiber-coax cable, which is why uploads top out near 50–57 Mbps instead of fiber’s near-gigabit upstream.
Do I need gigabit service just for gaming?
No, because gameplay uses only a few megabits. A gigabit plan shortens large patch downloads and keeps bandwidth free for 4K streams. A 300–500 Mbps fiber plan still delivers single-digit ping if budget is tight.
Why does my gigabit speed test stop around 940 Mbps?
Ethernet overhead plus a 1 GbE port’s physical limit shave roughly six percent off the theoretical 1,000 Mbps. Upgrade the router and client to 2.5 GbE or faster to break the ceiling.
Are gigabit plans unlimited?
AT&T, IQ Fiber, and Home Telecom list unlimited data. Xfinity is unlimited when you take the current five-year guarantee. WOW! is also unlimited in Charleston, because its data caps apply only in select other markets.
Can I use my own modem or router?
Yes. Cable providers accept approved DOCSIS 3.1 modems, although bundled gateways often remove the savings. Fiber optical terminals remain provider-owned, but most run in passthrough mode so you can connect your own Wi-Fi 6E or Wi-Fi 7 router.
Is Google Fiber coming to Charleston?
No official commitment exists as of August 4, 2026. The more tangible expansion to watch is the Lumos / T-Mobile Fiber build that targets about 50,000 Charleston County homes by 2027.
Conclusion
Choosing the right gigabit provider in Charleston ultimately comes down to what is available at your address, the long-term price, and how you use the connection. Run multiple address checks, compare broadband labels, and keep screenshots of every offer before you order.
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