  We present a simple extension of the Standard Model that leads to
renormalizable long-range vector-mediated neutrino self-interactions. This
model can resolve the Hubble tension by delaying the onset of neutrino
free-streaming during recombination, without conflicting with other
measurements. The extended gauge, scalar and neutrino sectors lead to
observable signatures, including invisible Higgs and $Z$ decays, thereby
relating the Hubble tension to precision measurements at the LHC and future
colliders. The model has a new neutrinophilic gauge boson with
$m_{Z'}\sim\mathcal{O}(10~\mathrm{eV})$ and charged Higgses at a few
$100~\mathrm{GeV}$. It requires hidden neutrinos with active-hidden mixing
angles larger than $5\times10^{-4}$ and masses in the range
$1\div300\mathrm{eV}$, which could also play a role for short baseline neutrino
oscillation anomalies.
